CVE-2026-120252

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 2023.1.23 through 2026.10.10 contains a stack-based buffer overflow vulnerability in the lossless JPEG Define Huffman Table parser in decode_jpegsof3(). Attackers can supply a crafted lossless JPEG whose DHT symbol counts wrap an 8-bit sum, overflowing the 32-entry HufVal and HufSz stack arrays and crashing the calling process.

CVSS vector

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

Weaknesses

CWE-121

Public exploit & PoC references

https://github.com/cgohlke/imagecodecs
https://github.com/cgohlke/imagecodecs/blob/v2026.10.10/3rdparty/jpegsof3/jpegsof3.cpp#L394
https://github.com/cgohlke/imagecodecs/issues/157

All references

https://github.com/cgohlke/imagecodecs
https://github.com/cgohlke/imagecodecs/blob/v2026.10.10/3rdparty/jpegsof3/jpegsof3.cpp#L394
https://github.com/cgohlke/imagecodecs/issues/157
https://www.vulncheck.com/advisories/imagecodecs-2023.1.23-through-2026.10.10-stack-buffer-overflow-via-jpegsof3-decode

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

Related CVEs

CRITICALCVE-2017-20242
UNSCOREDCVE-2025-29897
MEDIUMCVE-2025-60492PoC
MEDIUMCVE-2025-71384
HIGHCVE-2026-100216
MEDIUMCVE-2026-100745
HIGHCVE-2026-100908PoC
MEDIUMCVE-2026-101003PoC

Related by shared AI tags and CWE weakness class. Browse the full archive.