CVE-2026-76957 (Medium) detected in libexpatR_2_7_5

[mend-bolt-for-github]

CVE-2026-76957 - Medium Severity Vulnerability

Vulnerable Library - libexpatR_2_7_5

https://github.com/libexpat/libexpat

Library home page: https://github.com/sailfishos-mirror/libexpat.git

Found in base branches: stable/4.0, master

Vulnerable Source Files (1)

/contrib/expat/lib/xmltok.c

Vulnerability Details

libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412.

Publish Date: 2026-08-20

URL: CVE-2026-76957

CVSS 3 Score Details (4.9)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Local
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: Low

For more information on CVSS3 Scores, click here.

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