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CVE-2026-56378

ImageMagick - Heap Out-of-Bounds Read in PCD Decoder

Published: 6/21/2026 Last updated: 6/22/2026 Reserved: 6/21/2026

ImageMagick before 7.1.2-15 (and 6.x before 6.9.13-40) contains a heap out-of-bounds read in the PCD coder's DecodeImage loop. A crafted PCD file can trigger a one-byte heap out-of-bounds read during image decoding, resulting in denial of service and potential disclosure of an adjacent heap byte.

CNA assigner: VulnCheck (83251b91-4cc7-4094-a5c7-464a1b83ea10) Requested by: n/a

Metrics

Version Score Severity Vector String
4.0 6.3 Medium CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
3.1 3.7 Low CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Opam packages affected (2)

conf-libMagickCore ocsigen-start

Products affected (3)

Product Vendor Version
ImageMagick ImageMagick All versions < V2.18
ImageMagick ImageMagick < 5.2.32
ImageMagick ImageMagick n/a

References (4)

Credits (2)