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CVE-2026-22691

pypdf has possible long runtimes for malformed startxref PUBLISHED

Description (CNA)

pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for malformed startxref. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for invalid startxref entries. When rebuilding the cross-reference table, PDF files with lots of whitespace characters become problematic. Only the non-strict reading mode is affected. Only the non-strict reading mode is affected. This issue has been patched in version 6.6.0.

Affected (CNA)

Vendor / productVersions
py-pdf / pypdfaffected < 6.6.0

CWE

CWE-1333, CWE-400

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.