CVE-2026-48961: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-hjrw-gmwj-xc9c
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CVSS 7.3
CWE-755
Published
Advisory Summary

CVE-2026-48961 is a HIGH (CVSS 7.3) security vulnerability vulnerability (CWE-755: Improper Handling of Exceptional Conditions) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not handle or incorrectly handles an exceptional condition.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-48961 at a Glance

CVE Identifier CVE-2026-48961
GHSA Identifier GHSA-hjrw-gmwj-xc9c
Severity HIGH
CVSS v3.1 Base Score 7.3
CWE Classification CWE-755: Improper Handling of Exceptional Conditions
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.3

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:L/I:L/A:L).

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 Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-48961

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-2026-48961, 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-755: Improper Handling of Exceptional Conditions, where the product does not handle or incorrectly handles an exceptional condition. 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

IO::Compress versions from 2.207 before 2.220 for Perl ship a zipdetails CLI tool that crashes with undefined subroutine on Info-ZIP Unix Extra Field with 8-byte UID or GID. When decode_ux() in bin/zipdetails handles an Info-ZIP Unix Extra Field (tag 0x7875) with UID Size or GID Size set to 8, causing zipdetails to decode an 8-byte UID or GID value, it dispatches through decodeLitteEndian(), which calls a misnamed helper unpackValueQ. The actual function defined in the same file is unpackValue_Q (with underscore); the call raises 'Undefined subroutine &main::unpackValueQ' and the script exits with status 255. Library callers of IO::Compress and IO::Uncompress are not affected; the defect is in the bundled CLI tool.

References

NVD — CVE-2026-48961 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-48961
Security Fix Commit FIX COMMIT
https://github.com/pmqs/IO-Compress/commit/33c89d03d6e746ed2ead4f2f6570d47864c61bc7.patch
metacpan.org/release/pmqs/io-com... WEB
https://metacpan.org/release/PMQS/IO-Compress-2.220/changes
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/05/27/3

Frequently Asked Questions

What is CVE-2026-48961?
CVE-2026-48961 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-755: Improper Handling of Exceptional Conditions.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-48961?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-48961?
CVE-2026-48961 has a CVSS v3.1 base score of 7.3 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2026-48961?
CVE-2026-48961 is classified under CWE-755: Improper Handling of Exceptional Conditions (The product does not handle or incorrectly handles an exceptional condition.).
How can I check Maven dependencies for CVE-2026-48961?
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-hjrw-gmwj-xc9c",
  "modified" : "2026-05-29T18:31:16Z",
  "published" : "2026-05-27T06:31:34Z",
  "aliases" : [ "CVE-2026-48961" ],
  "details" : "IO::Compress versions from 2.207 before 2.220 for Perl ship a zipdetails CLI tool that crashes with undefined subroutine on Info-ZIP Unix Extra Field with 8-byte UID or GID.\n\nWhen decode_ux() in bin/zipdetails handles an Info-ZIP Unix Extra Field (tag 0x7875) with UID Size or GID Size set to 8, causing zipdetails to decode an 8-byte UID or GID value, it dispatches through decodeLitteEndian(), which calls a misnamed helper unpackValueQ. The actual function defined in the same file is unpackValue_Q (with underscore); the call raises 'Undefined subroutine &main::unpackValueQ' and the script exits with status 255.\n\nLibrary callers of IO::Compress and IO::Uncompress are not affected; the defect is in the bundled CLI tool.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-48961"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pmqs/IO-Compress/commit/33c89d03d6e746ed2ead4f2f6570d47864c61bc7.patch"
  }, {
    "type" : "WEB",
    "url" : "https://metacpan.org/release/PMQS/IO-Compress-2.220/changes"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/05/27/3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-755" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-27T04:16:31Z"
  }
}