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CVE-2026-22690

pypdf has possible long runtimes for missing /Root object with large /Size values 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 missing /Root object with large /Size values. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for actually invalid files. This can be achieved by omitting the /Root entry in the trailer, while using a rather large /Size value. 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-400

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.