CVE-2026-120252

6.8 mediumEPSS 0.1%

Medium (6.8). EPSS 0.1% estimated probability of exploitation activity in the next 30 days.

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.

Severity

CVSS 4.0

6.8 medium

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

CVSS 3.1

5.5 medium

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

EPSS: 0.1% estimated probability of exploitation activity in the next 30 days; 3rd percentile. Scored 2026-11-01. A forecast for this CVE across the internet, not for your own systems.
CWE: CWE-121 Stack-based Buffer Overflow
Published: 2026-11-01 01:17 UTC
Modified: 2026-11-01 01:17 UTC
Record from: the NVD, synced 2026-11-01 01:37 UTC

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References

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