Is there a public exploit for CVE-2026-120251?

No public exploit for CVE-2026-120251 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-2026-120251?

CVE-2026-120251 scores CVSS 6.8 (v4.0), rated medium.

What does CVE-2026-120251 affect?

CVE-2026-120251 affects cgohlke imagecodecs.

6.8 Medium

imagecodecs 2026.3.6 through 2026.10.10 contains an infinite loop vulnerability in ccittfax4decodesize() that allows attackers to hang the…

CVE-2026-120251

imagecodecs 2026.3.6 through 2026.10.10 contains an infinite loop vulnerability in ccittfax4decodesize() that allows attackers to hang the calling process by supplying a crafted CCITT Group 4 stream. Attackers can provide an 8-byte G4 stream lacking EOFB to ccittfax4decode() or the numcodecs Ccittfax4 codec, consuming full CPU until the process is killed.

Assessment

CVSS: 6.8 (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: 1 November 2026
Last updated: 1 November 2026
Affected: cgohlke · imagecodecs
Assigner: VulnCheck

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

At the source

EUVD (ENISA)

References

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