CVE-2026-5188

N/A

Description

An integer underflow issue exists in wolfSSL when parsing the Subject Alternative Name (SAN) extension of X.509 certificates. A malformed certificate can specify an entry length larger than the enclosing sequence, causing the internal length counter to wrap during parsing. This results in incorrect handling of certificate data. The issue is limited to configurations using the original ASN.1 parsing implementation which is off by default.

CVE Details

CVSS v3.1 ScoreN/A

Published4/10/2026

Last Modified4/10/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-191

References

https://github.com/wolfSSL/wolfssl/pull/10024(facts@wolfssl.com)

IOC Correlations

No correlations recorded

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