CVE-2026-120251

5.5 MEDIUMpublic exploit available

Published 2026-11-01 · Updated 2026-11-01

AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.

NVD description

imagecodecs 2026.3.6 through 2026.10.10 contains an infinite loop vulnerability in ccitt_fax4_decode_size() 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 ccittfax4_decode() or the numcodecs Ccittfax4 codec, consuming full CPU until the process is killed.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weaknesses

CWE-835

Public exploit & PoC references

https://github.com/cgohlke/imagecodecs
https://github.com/cgohlke/imagecodecs/blob/v2026.10.10/3rdparty/ccitt/ccitt.c#L1449
https://github.com/cgohlke/imagecodecs/issues/158

All references

https://github.com/cgohlke/imagecodecs
https://github.com/cgohlke/imagecodecs/blob/v2026.10.10/3rdparty/ccitt/ccitt.c#L1449
https://github.com/cgohlke/imagecodecs/issues/158
https://www.vulncheck.com/advisories/imagecodecs-2026.3.6-through-2026.10.10-infinite-loop-via-ccittfax4-decode

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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