CVE-2026-56378: imagemagick Out-of-bounds Read
CVSS: 8.2v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-56378DEBIAN-CVE-2026-56378GHSA-wgxp-q8xq-wpp9
Published 21-06-2026Last modified 22-06-2026
Vulnerability summary
CVE-2026-56378 is a high (CVSS 8.2) Out-of-bounds Read vulnerability in imagemagick. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 31.7% of scored vulnerabilities.
CVSS score
8.2/10
010
High · v3.1 (NVD)EPSS score
0.39%
0%100%
Low · +0.17 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 2 · Related 2Timeline
- 21-06-2026PublishedVulnerability first disclosed.
- 22-06-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
8 scores · 5 sources · 2 versionsMedium 6.3Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- NVDNIST6.3MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/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
High 8.2Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:HSources5 sources · 3.7–8.2
- CVE.orgCNA3.7LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:NDiffers
- OSV · UbuntuEcosystem advisory · calculated8.2HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
- OSV · DebianEcosystem advisory · calculated8.2HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
- OSV · NugetEcosystem advisory · calculated3.7LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:NDiffers
EPSS trend
Probability
0.39%
Chance of exploitation in the next 30 days
Percentile
32%
Versus all other CVEs
30-day change
+0.17 pp
From 0.22% on 21-09-2026
21-09-202621-10-2026
EPSS score0.39%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
NuGet19 products
- magick.net-q16-anycpu< 14.10.3
- Magick.NET-Q16-arm64< 14.10.3
- magick.net-q16-hdri-anycpu< 14.10.3
- Magick.NET-Q16-HDRI-arm64< 14.10.3
- Magick.NET-Q16-HDRI-OpenMP-arm64< 14.10.3
Debian1 product
- imagemagick< 8:6.9.11.60+dfsg-1.6+deb12u12 | < 8:7.1.1.43+dfsg1-1+deb13u11 | < 8:7.1.2.15+dfsg1-1
Imagemagick1 product
- imagemagick< 7.1.2-15 | < 6.9.13-40 | ≥ 6.9.0-0, < 6.9.13-40 | ≥ 7.1.2-0, < 7.1.2-15
Ubuntu1 product
- imagemagick< 8:6.7.7.10-6ubuntu3.13+esm25 | < 8:6.8.9.9-7ubuntu5.16+esm24 | < 8:6.9.7.4+dfsg-16ubuntu6.15+esm16 | < 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm14 | < 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm14 | < 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm13 | All versions (No fix recorded)
4 vendors · 22 products
References
10 links- github.com/ImageMagick/ImageMagick/security/advisories/GHSA-wgxp-q8xq-wpp9Vendor AdvisoryREPORTWEBThird Party Advisory
- www.vulncheck.com/advisories/imagemagick-heap-out-of-bounds-read-in-pcd-decoderThird Party Advisory
