Vulnerability 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 Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/cgohlke/imagecodecs
- https://github.com/cgohlke/imagecodecs/blob/v2026.10.10/3rdparty/jpegsof3/jpegso
- https://github.com/cgohlke/imagecodecs/issues/157
- https://www.vulncheck.com/advisories/imagecodecs-2023.1.23-through-2026.10.10-st
FAQ
What is CVE-2026-120252?
CVE-2026-120252 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 loss...
How severe is CVE-2026-120252?
CVE-2026-120252 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-120252?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.