Is there a public exploit for CVE-2026-124317?

No public exploit for CVE-2026-124317 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-124317?

CVE-2026-124317 scores CVSS 6.3 (v4.0), rated medium.

What does CVE-2026-124317 affect?

CVE-2026-124317 affects libexpat libexpat.

6.3 Medium

libexpat through 2.10.0 contains an out-of-bounds read vulnerability in unknowntoUtf8() and unknowntoUtf16() in xmltok.c when handling…

CVE-2026-124317

libexpat through 2.10.0 contains an out-of-bounds read vulnerability in unknowntoUtf8() and unknowntoUtf16() in xmltok.c when handling application-registered unknown encodings. Attackers can supply a document ending in a truncated multibyte sequence so the convert callback reads past the parse buffer, leaking adjacent memory or crashing applications.

Assessment

CVSS: 6.3 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 7 November 2026
Last updated: 7 November 2026
Affected: libexpat · libexpat
Assigner: VulnCheck

CVSS vectorCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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