CVE-2026-6681

UNKNOWN 0.0

PKCS#7 decode ignores caller output buffer size, writing past buffer bounds

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

The PKCS#7 decode path ignores the caller-supplied output buffer size (outputSz), allowing decoded content to be written past the bounds of the provided buffer. This affects wolfSSL 5.9.0 and earlier and was fixed in the 5.9.1 release.

CWE	CWE-787 CWE-120
Vendor	wolfssl
Product	wolfssl
Published	Jun 25, 2026

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Affected Versions

wolfSSL / wolfSSL

3.10.0 ≤ 5.9.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/wolfSSL/wolfssl/pull/10116 wolfssl.com: https://www.wolfssl.com/docs/security-vulnerabilities/

Credits

Nicholas Carlini from Anthropic