CVE-2021-26291: Maven compat Origin Validation Error Vulnerability

CRITICAL
Advisory Identifier: GHSA-2f88-5hg8-9x2x
Share
CVSS 9.1
CWE-346
Published
Advisory Summary

CVE-2021-26291 is a CRITICAL (CVSS 9.1) origin validation error vulnerability (CWE-346: Origin Validation Error) affecting Maven compat libraries in the Maven ecosystem. The issue involves origin validation error in apache maven. Remediation is available by upgrading affected packages to version 3.8.1.

CVE-2021-26291 at a Glance

CVE Identifier CVE-2021-26291
GHSA Identifier GHSA-2f88-5hg8-9x2x
Severity CRITICAL
CVSS v3.1 Base Score 9.1
CWE Classification CWE-346: Origin Validation Error
Affected Product Maven compat
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2021-26291

To remediate this vulnerability, upgrade all affected Maven compat dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.apache.maven:maven-compat fixed: 3.8.1 
<dependency>
    <groupId>org.apache.maven</groupId>
    <artifactId>maven-compat</artifactId>
    <version>3.8.1</version>
</dependency>
org.apache.maven:maven-core fixed: 3.8.1 
<dependency>
    <groupId>org.apache.maven</groupId>
    <artifactId>maven-core</artifactId>
    <version>3.8.1</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.apache.maven

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2021-26291, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.apache.maven

Analyze the terminal output to locate any version of Maven compat in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.8.1), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.apache.maven command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-346: Origin Validation Error, where the product does not properly verify that the source of data or communication is valid. In Maven compat, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Apache Maven will follow repositories that are defined in a dependency’s Project Object Model (pom) which may be surprising to some users, resulting in potential risk if a malicious actor takes over that repository or is able to insert themselves into a position to pretend to be that repository. Maven is changing the default behavior in 3.8.1+ to no longer follow http (non-SSL) repository references by default. More details available in the referenced urls. If you are currently using a repository manager to govern the repositories used by your builds, you are unaffected by the risks present in the legacy behavior, and are unaffected by this vulnerability and change to default behavior. See this link for more information about repository management: https://maven.apache.org/repository-management.html

CVE-2021-26291 Affected Maven compat Versions

2 component(s)
Fixed Versions:
3.8.1
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.maven:maven-compat
maven/org.apache.maven/maven-compat
Maven
< 3.8.1
3.8.1
org.apache.maven:maven-core
maven/org.apache.maven/maven-core
Maven
< 3.8.1
3.8.1

References

NVD — CVE-2021-26291 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26291
Security Fix Commit FIX COMMIT
https://github.com/apache/maven/commit/899465aeec03753ea91e15a79579eab76369c016
maven.apache.org/docs/3.8.1/release-... WEB
https://maven.apache.org/docs/3.8.1/release-notes.html
Security Fix Commit FIX COMMIT
https://github.com/apache/maven/commit/fa79cb22e456cc65522b5bab8c4240fe08c5775f
lists.apache.org/thread.html/r77af3a... WEB
https://lists.apache.org/thread.html/r77af3ac7c3bfbd5454546e13faf7aec21d627bdcf36c9ca240436b94@%3Cissues.karaf.apache.org%3E
lists.apache.org/thread.html/r78fb6d... WEB
https://lists.apache.org/thread.html/r78fb6d2cf0ca332cfa43abd4471e75fa6c517ed9cdfcb950bff48d40@%3Cjira.kafka.apache.org%3E
lists.apache.org/thread.html/r86aebd... WEB
https://lists.apache.org/thread.html/r86aebd0387ae19b740b3eb28bad83fe6aceca0d6257eaa810a6e0002@%3Ccommits.kafka.apache.org%3E
lists.apache.org/thread.html/r86e1c8... WEB
https://lists.apache.org/thread.html/r86e1c81e03f441855f127980e9b3d41939d04a7caea2b7ab718e2288@%3Cjira.kafka.apache.org%3E
lists.apache.org/thread.html/r96cc12... WEB
https://lists.apache.org/thread.html/r96cc126d3ee9aa42af9d3bb4baa94828b0a5f656584a50dcc594125f@%3Cissues.karaf.apache.org%3E
lists.apache.org/thread.html/r9a0276... WEB
https://lists.apache.org/thread.html/r9a027668558264c4897633e66bcb7784099fdec9f9b22c38c2442f00%40%3Cusers.maven.apache.org%3E
lists.apache.org/thread.html/r9a0276... WEB
https://lists.apache.org/thread.html/r9a027668558264c4897633e66bcb7784099fdec9f9b22c38c2442f00@%3Cusers.maven.apache.org%3E
lists.apache.org/thread.html/ra88a0e... WEB
https://lists.apache.org/thread.html/ra88a0eba7f84658cefcecc0143fd8bbad52c229ee5dfcbfdde7b6457@%3Cdev.jena.apache.org%3E
lists.apache.org/thread.html/ra9d984... WEB
https://lists.apache.org/thread.html/ra9d984eccfd2ae7726671e025f0296bf03786e5cdf872138110ac29b@%3Ccommits.druid.apache.org%3E
lists.apache.org/thread.html/rc7ae25... WEB
https://lists.apache.org/thread.html/rc7ae2530063d1cd1cf8e9fa130d10940760f927168d4063d23b8cd0a@%3Ccommits.kafka.apache.org%3E
lists.apache.org/thread.html/rc9e441... WEB
https://lists.apache.org/thread.html/rc9e441c1576bdc4375d32526d5cf457226928e9c87b9f54ded26271c@%3Cissues.karaf.apache.org%3E
lists.apache.org/thread.html/rcd37d9... WEB
https://lists.apache.org/thread.html/rcd37d9214b08067a2e8f2b5b4fd123a1f8cb6008698d11ef44028c21@%3Cissues.karaf.apache.org%3E
lists.apache.org/thread.html/rcd6c3a... WEB
https://lists.apache.org/thread.html/rcd6c3a36f1dbc130da1b89d0f320db7040de71661a512695a8d513ac@%3Cdev.kafka.apache.org%3E
lists.apache.org/thread.html/rdcbad6... WEB
https://lists.apache.org/thread.html/rdcbad6d8ce72c79827ed8c635f9a62dd919bb21c94a0b64cab2efc31@%3Cissues.karaf.apache.org%3E
lists.apache.org/thread.html/re75f8b... WEB
https://lists.apache.org/thread.html/re75f8b3dbc5faa1640908f87e644d373e00f8b4e6ba3e2ba4bd2c80b@%3Ccommits.druid.apache.org%3E
lists.apache.org/thread.html/red3bf6... WEB
https://lists.apache.org/thread.html/red3bf6cbfd99e36b0c0a4fa1cea1eef1eb300c6bd8f372f497341265@%3Cdev.kafka.apache.org%3E
lists.apache.org/thread.html/rf9abfc... WEB
https://lists.apache.org/thread.html/rf9abfc0223747a56694825c050cc6b66627a293a32ea926b3de22402@%3Cissues.karaf.apache.org%3E
lists.apache.org/thread.html/rfc0db1... WEB
https://lists.apache.org/thread.html/rfc0db1f3c375087e69a239f9284ded72d04fbb55849eadde58fa9dc2@%3Cissues.karaf.apache.org%3E
lists.apache.org/thread.html/rfc27e2... WEB
https://lists.apache.org/thread.html/rfc27e2727a20a574f39273e0432aa97486a332f9b3068f6ac1346594@%3Cdev.myfaces.apache.org%3E
Maven compat Security Information SECURITY
https://www.oracle.com/security-alerts/cpuapr2022.html
Maven compat Security Information SECURITY
https://www.oracle.com/security-alerts/cpujul2022.html
Maven compat Security Information SECURITY
https://www.whitesourcesoftware.com/resources/blog/maven-security-vulnerability-cve-2021-26291
Maven compat Source Repository REPOSITORY
https://github.com/apache/maven
issues.apache.org/jira/browse/mng-711... WEB
https://issues.apache.org/jira/browse/MNG-7116
issues.apache.org/jira/browse/mng-711... WEB
https://issues.apache.org/jira/browse/MNG-7117
lists.apache.org/thread.html/r0556ce... WEB
https://lists.apache.org/thread.html/r0556ce5db7231025785477739ee416b169d8aff5ee9bac7854d64736@%3Cannounce.apache.org%3E
lists.apache.org/thread.html/r06db40... WEB
https://lists.apache.org/thread.html/r06db4057b74e0598a412734f693a34a8836ac6f06d16d139e5e1027c@%3Cdev.maven.apache.org%3E
lists.apache.org/thread.html/r07a89b... WEB
https://lists.apache.org/thread.html/r07a89b32783f73bda6903c1f9aadeb859e5bef0a4daed6d87db8e4a9@%3Cissues.karaf.apache.org%3E
lists.apache.org/thread.html/r08a401... WEB
https://lists.apache.org/thread.html/r08a401f8c98a99f68d061fde6e6659d695f28d60fe4f0413bcb355b0@%3Ccommits.druid.apache.org%3E
lists.apache.org/thread.html/r0a5e4f... WEB
https://lists.apache.org/thread.html/r0a5e4ff2a7ca7ad8595d7683afbaeb3b8788ba974681907f97e7dc8e@%3Cjira.kafka.apache.org%3E
lists.apache.org/thread.html/r0d0833... WEB
https://lists.apache.org/thread.html/r0d083314aa3934dd4b6e6970d1f6ee50f6eaa9d867deb2cd96788478@%3Cjira.kafka.apache.org%3E
lists.apache.org/thread.html/r167dbc... WEB
https://lists.apache.org/thread.html/r167dbc42ef7c59802c2ca1ac14735ef9cf687c25208229993d6206fe@%3Cissues.karaf.apache.org%3E
lists.apache.org/thread.html/r2721ab... WEB
https://lists.apache.org/thread.html/r2721aba31a8562639c4b937150897e24f78f747cdbda8641c0f659fe@%3Cusers.kafka.apache.org%3E
lists.apache.org/thread.html/r2ddabd... WEB
https://lists.apache.org/thread.html/r2ddabd06d94b60cfb0141e4abb23201c628ab925e30742f61a04d013@%3Cissues.karaf.apache.org%3E
lists.apache.org/thread.html/r30a139... WEB
https://lists.apache.org/thread.html/r30a139c165b3da6e0d5536434ab1550534011b1fdfcd2f5d95892c5b@%3Cissues.karaf.apache.org%3E
lists.apache.org/thread.html/r30e9fc... WEB
https://lists.apache.org/thread.html/r30e9fcba679d164158cc26236704c351954909c18cb2485d11038aa6@%3Cdev.kafka.apache.org%3E
lists.apache.org/thread.html/r340e75... WEB
https://lists.apache.org/thread.html/r340e75c9bb6e8661b89e1cf2c52f4638a18312e57bd884722bc28f52@%3Cjira.kafka.apache.org%3E
lists.apache.org/thread.html/r39fa6e... WEB
https://lists.apache.org/thread.html/r39fa6ec4b7e912d3e04ea68efd23e554ec9c8efa2c96f5b45104fc61@%3Cjira.kafka.apache.org%3E
lists.apache.org/thread.html/r3f0450... WEB
https://lists.apache.org/thread.html/r3f0450dcab7e63b5f233ccfbc6fca5f1867a75c8aa2493ea82732381@%3Cdev.jena.apache.org%3E
lists.apache.org/thread.html/r4e1619... WEB
https://lists.apache.org/thread.html/r4e1619cfefcd031fac62064a3858f5c9229eef907bd5d8ef14c594fc@%3Cissues.karaf.apache.org%3E
lists.apache.org/thread.html/r52c6cd... WEB
https://lists.apache.org/thread.html/r52c6cda14dc6315dc79e72d30109f4589e9c6300ef6dc1a019da32d4@%3Cissues.karaf.apache.org%3E
lists.apache.org/thread.html/r53cd5d... WEB
https://lists.apache.org/thread.html/r53cd5de57aaa126038c5301d8f518f3defab3c5b1c7e17c97bad08d8@%3Cissues.karaf.apache.org%3E
lists.apache.org/thread.html/r5ae6aa... WEB
https://lists.apache.org/thread.html/r5ae6aaa8a2ce86145225c3516bb45d315c0454e3765d651527e5df8a@%3Ccommits.kafka.apache.org%3E
lists.apache.org/thread.html/r71bc13... WEB
https://lists.apache.org/thread.html/r71bc13669be84c2ff45b74a67929bc2da905c152e12a39b406e3c2a0@%3Cissues.karaf.apache.org%3E
lists.apache.org/thread.html/r7212b8... WEB
https://lists.apache.org/thread.html/r7212b874e575e59d648980d91bc22e684906aee9b211ab92da9591f5@%3Cdev.kafka.apache.org%3E
lists.apache.org/thread.html/r74329c... WEB
https://lists.apache.org/thread.html/r74329c671df713f61ae4620ee2452a0443ccad7f33c60e8ed7d21ff9@%3Cissues.karaf.apache.org%3E
Maven compat Security Information SECURITY
http://www.openwall.com/lists/oss-security/2021/04/23/5

Frequently Asked Questions

What is CVE-2021-26291?
CVE-2021-26291 is a security vulnerability in Maven compat involving Origin Validation Error in Apache Maven under CWE-346: Origin Validation Error.
Which Maven compat versions are affected?
Affected versions include releases prior to 3.8.1 across affected packages: org.apache.maven:maven-compat, org.apache.maven:maven-core.
What version fixes CVE-2021-26291?
Upgrading to 3.8.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is maven-compat affected?
Yes, org.apache.maven:maven-compat is affected in releases prior to 3.8.1. Upgrade your dependency to 3.8.1 or later.
Is maven-core affected?
Yes, org.apache.maven:maven-core is affected in releases prior to 3.8.1. Upgrade your dependency to 3.8.1 or later.
What is the CVSS score of CVE-2021-26291?
CVE-2021-26291 has a CVSS v3.1 base score of 9.1 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2021-26291?
CVE-2021-26291 is classified under CWE-346: Origin Validation Error (The product does not properly verify that the source of data or communication is valid.).
How can I check Maven dependencies for CVE-2021-26291?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.apache.maven'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2f88-5hg8-9x2x",
  "modified" : "2023-08-15T17:39:29Z",
  "published" : "2021-06-16T17:32:49Z",
  "aliases" : [ "CVE-2021-26291" ],
  "summary" : "Origin Validation Error in Apache Maven",
  "details" : "Apache Maven will follow repositories that are defined in a dependency’s Project Object Model (pom) which may be surprising to some users, resulting in potential risk if a malicious actor takes over that repository or is able to insert themselves into a position to pretend to be that repository. Maven is changing the default behavior in 3.8.1+ to no longer follow http (non-SSL) repository references by default. More details available in the referenced urls. If you are currently using a repository manager to govern the repositories used by your builds, you are unaffected by the risks present in the legacy behavior, and are unaffected by this vulnerability and change to default behavior. See this link for more information about repository management: https://maven.apache.org/repository-management.html",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.maven:maven-compat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.8.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.maven:maven-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.8.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-26291"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/maven/commit/899465aeec03753ea91e15a79579eab76369c016"
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  }, {
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  }, {
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    "url" : "https://maven.apache.org/docs/3.8.1/release-notes.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.oracle.com/security-alerts/cpuapr2022.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.oracle.com/security-alerts/cpujul2022.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.whitesourcesoftware.com/resources/blog/maven-security-vulnerability-cve-2021-26291"
  }, {
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  }, {
    "type" : "WEB",
    "url" : "https://issues.apache.org/jira/browse/MNG-7116"
  }, {
    "type" : "WEB",
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  "database_specific" : {
    "cwe_ids" : [ "CWE-346" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-04-26T22:21:03Z",
    "nvd_published_at" : "2021-04-23T15:15:00Z"
  }
}