JLSEC-2026-1046 Medium 6.3

ImageMagick before 7.1.2-19 contains a memory leak vulnerability in the PNG encoder when writing...

JLSEC Published: Jul 30, 2026
Modified: Jul 30, 2026
Severity: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Affected Packages: ImageMagick_jll < 7.1.2023+0
Upstream: CVE-2026-56365 GHSA-hq73-7c65-p9cq EUVD-2026-40448

ImageMagick before 7.1.2-19 contains a memory leak vulnerability in the PNG encoder when writing MNG images. Attackers can trigger the encoder failure condition to exhaust memory resources and cause denial of service.

References

https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-x928-4434-crqj
https://github.com/advisories/GHSA-hq73-7c65-p9cq
https://nvd.nist.gov/vuln/detail/CVE-2026-56365
https://www.vulncheck.com/advisories/imagemagick-memory-leak-in-png-encoder-via-mng-image-writing