CVE-2026-115585: pypdf: Possible long runtimes for repeated malformed cross-reference entries (Follow-up)

October 23, 2026

An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires cross-reference streams with repeated malformed cross-reference streams.

References

github.com/advisories/GHSA-jr96-gvgh-j3r4
github.com/py-pdf/pypdf/commit/68a0e5046cc9e14a6c24a21a713f3c7fbde18b4b
github.com/py-pdf/pypdf/pull/4240
github.com/py-pdf/pypdf/releases/tag/6.21.2
github.com/py-pdf/pypdf/security/advisories/GHSA-jr96-gvgh-j3r4
nvd.nist.gov/vuln/detail/CVE-2026-115585

Code Behaviors & Features

Detect and mitigate CVE-2026-115585 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →