HIGH 7.1 NVD
CVE-2026-115585
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an incomplete remediation for repeated malformed cross-reference entries in GHSA-55h5-
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an incomplete remediation for repeated malformed cross-reference entries in GHSA-55h5-xmcq-c37v could still trigger a complete PDF stream reload during each recovery attempt even when a recovery cache was present, causing crafted cross-reference streams to produce long runtimes. This issue is fixed in version 6.21.2.
References
- https://github.com/py-pdf/pypdf/commit/68a0e5046cc9e14a6c24a21a713f3c7fbde18b4b
- https://github.com/py-pdf/pypdf/pull/4240
- https://github.com/py-pdf/pypdf/releases/tag/6.21.2
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-jr96-gvgh-j3r4
This high severity vulnerability with a CVSS score of 7.1 was published on 2026-10-23 via NVD.
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