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Security Advisories

CVE-2026-28351

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-28351

Severity

Unknown
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Summary

Manipulated RunLengthDecode streams can exhaust RAM

Description

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.4, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream using the RunLengthDecode filter. This has been fixed in pypdf 6.7.4. As a workaround, consider applying the changes from PR #3664.

References

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