CVE-2026-86473: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-9cmm-29p3-73gr
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CVSS 9.1
CWE-613
Published
Advisory Summary

CVE-2026-86473 is a CRITICAL (CVSS 9.1) security vulnerability vulnerability (CWE-613: Insufficient Session Expiration) affecting Software libraries in the Maven ecosystem. The weakness occurs when according to wasc, "insufficient session expiration is when a web site permits an attacker to reuse old session credentials or session ids for authorization.". Remediation is available in the latest vendor maintenance releases.

CVE-2026-86473 at a Glance

CVE Identifier CVE-2026-86473
GHSA Identifier GHSA-9cmm-29p3-73gr
Severity CRITICAL
CVSS v3.1 Base Score 9.1
CWE Classification CWE-613: Insufficient Session Expiration
Affected Product Software
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-2026-86473

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

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

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-86473, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

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

Note: The mvn dependency:tree 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-613: Insufficient Session Expiration, where according to wasc, "insufficient session expiration is when a web site permits an attacker to reuse old session credentials or session ids for authorization.". In Software, 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 Airflow: the Core API logout endpoint revokes only a session token presented as the _token cookie. When a client logs out presenting its credential as an Authorization bearer header instead, the endpoint returns its normal logout response but revokes nothing, so the token remains valid until it expires. An attacker who already holds a copy of that token keeps the victim's access after the victim has logged out and believes the session ended; the default token lifetime is 24 hours and is configurable. Affects API clients that authenticate with a bearer token rather than the browser session cookie. The attacker must already possess a copy of a valid token; obtaining one is outside the scope of this issue, and no privileges beyond the victim's own are gained. Users of apache-airflow are recommended to upgrade to apache-airflow version 3.3.2 or later, which fixes the issue.

References

NVD — CVE-2026-86473 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86473
Software Source Repository REPOSITORY
https://github.com/apache/airflow/pull/72649
lists.apache.org/thread/k9z1p0q1ng8m... WEB
https://lists.apache.org/thread/k9z1p0q1ng8m68nlnv9d1fqzscrfm7vr
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/09/21/5

Frequently Asked Questions

What is CVE-2026-86473?
CVE-2026-86473 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-613: Insufficient Session Expiration.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-86473?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-86473?
CVE-2026-86473 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-2026-86473?
CVE-2026-86473 is classified under CWE-613: Insufficient Session Expiration (According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.").
How can I check Maven dependencies for CVE-2026-86473?
Run the dependency tree command: 'mvn dependency:tree'. 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-9cmm-29p3-73gr",
  "modified" : "2026-09-21T21:31:50Z",
  "published" : "2026-09-21T15:32:05Z",
  "aliases" : [ "CVE-2026-86473" ],
  "details" : "Apache Airflow: the Core API logout endpoint revokes only a session token presented as the _token cookie. When a client logs out presenting its credential as an Authorization bearer header instead, the endpoint returns its normal logout response but revokes nothing, so the token remains valid until it expires. An attacker who already holds a copy of that token keeps the victim's access after the victim has logged out and believes the session ended; the default token lifetime is 24 hours and is configurable.\n\nAffects API clients that authenticate with a bearer token rather than the browser session cookie. The attacker must already possess a copy of a valid token; obtaining one is outside the scope of this issue, and no privileges beyond the victim's own are gained.\n\nUsers of apache-airflow are recommended to upgrade to apache-airflow version 3.3.2 or later, which fixes the issue.",
  "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" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-86473"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/airflow/pull/72649"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/k9z1p0q1ng8m68nlnv9d1fqzscrfm7vr"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/09/21/5"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-613" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-21T15:17:32Z"
  }
}