CVE-2026-56378

HIGHNVD 8.23.7▼
EchelonGraph scoreMEDIUM confidence

Score 3.7 from GitHub Security Advisory published 2026-06-21. NVD baseline CVSS 8.2; sources differ by 4.5.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.2
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.2Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
8.2
EG Score
3.7(medium)
EG Risk
—
EPSS
13.0%
KEV
Not listed

Published

June 21, 2026

Last Modified

June 26, 2026

Advisory Details (2)

Auto-updated Jun 26, 2026
Patch available. Sources: github.
generic

ImageMagick - Heap Out-of-Bounds Read in PCD Decoder | Advisories | VulnCheck

https://www.vulncheck.com/advisories/imagemagick-heap-out-of-bounds-read-in-pcd-decoder
github Patch Available

PCD one byte heap out-of-bounds read · Advisory · ImageMagick/ImageMagick · GitHub

https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-wgxp-q8xq-wpp9

Vendor Advisories for CVE-2026-56378(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(19 across 1 ecosystem)
NuGet(19)
PackageVulnerable rangeFixed inDependents
Magick.NET-Q16-AnyCPU10.0.0 ... 9.1.2 (209 versions)14.10.3—
Magick.NET-Q16-arm6410.0.0 ... 9.1.2 (54 versions)14.10.3—
Magick.NET-Q16-HDRI-AnyCPU10.0.0 ... 9.1.2 (206 versions)14.10.3—
Magick.NET-Q16-HDRI-arm6410.0.0 ... 9.1.2 (54 versions)14.10.3—
Magick.NET-Q16-HDRI-OpenMP-arm6410.0.0 ... 9.1.2 (54 versions)14.10.3—
Magick.NET-Q16-HDRI-OpenMP-x6410.0.0 ... 9.1.2 (106 versions)14.10.3—
Magick.NET-Q16-HDRI-x6410.0.0 ... 9.1.2 (206 versions)14.10.3—
Magick.NET-Q16-HDRI-x8610.0.0 ... 9.1.2 (206 versions)14.10.3—
Magick.NET-Q16-OpenMP-arm6410.0.0 ... 9.1.2 (54 versions)14.10.3—
Magick.NET-Q16-OpenMP-x6410.0.0 ... 9.1.2 (106 versions)14.10.3—
Magick.NET-Q16-OpenMP-x86—14.10.3—
Magick.NET-Q16-x6410.0.0 ... 9.1.2 (225 versions)14.10.3—
Magick.NET-Q16-x8610.0.0 ... 9.1.2 (225 versions)14.10.3—
Magick.NET-Q8-AnyCPU10.0.0 ... 9.1.2 (209 versions)14.10.3—
Magick.NET-Q8-arm6410.0.0 ... 9.1.2 (54 versions)14.10.3—
Magick.NET-Q8-OpenMP-arm6410.0.0 ... 9.1.2 (54 versions)14.10.3—
Magick.NET-Q8-OpenMP-x6410.0.0 ... 9.1.2 (106 versions)14.10.3—
Magick.NET-Q8-x6410.0.0 ... 9.1.2 (225 versions)14.10.3—
Magick.NET-Q8-x8610.0.0 ... 9.1.2 (225 versions)14.10.3—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 54× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:25 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:31 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-19 02:29 UTCEPSS rescore
  7. 2026-07-18 10:04 UTCEPSS rescore
  8. 2026-07-16 20:22 UTCGHSA enrichment
  9. 2026-07-16 17:03 UTCEPSS rescore
  10. 2026-07-15 16:57 UTCEPSS rescore
  11. 2026-07-15 16:57 UTCEPSS rescore
  12. 2026-07-15 02:00 UTCEPSS rescore
  13. 2026-07-15 02:00 UTCEPSS rescore
  14. 2026-07-13 22:31 UTCEPSS rescore
  15. 2026-07-13 20:50 UTCGHSA enrichment
  16. 2026-07-13 06:13 UTCEPSS rescore
  17. 2026-07-13 06:13 UTCEPSS rescore
  18. 2026-07-12 05:46 UTCEPSS rescore
  19. 2026-07-11 08:27 UTCEPSS rescore
  20. 2026-07-11 08:27 UTCEPSS rescore
  21. 2026-07-11 02:12 UTCGHSA enrichment
  22. 2026-07-09 19:10 UTCEPSS rescore
  23. 2026-07-09 19:10 UTCEPSS rescore
  24. 2026-07-08 15:16 UTCEPSS rescore
  25. 2026-07-08 15:16 UTCEPSS rescore
Show 32 more
  1. 2026-07-08 07:31 UTCGHSA enrichment
  2. 2026-07-07 13:46 UTCEPSS rescore
  3. 2026-07-07 13:46 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-05 12:53 UTCGHSA enrichment
  9. 2026-07-05 02:31 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-04 06:31 UTCEPSS rescore
  12. 2026-07-04 06:31 UTCEPSS rescore
  13. 2026-07-02 18:12 UTCGHSA enrichment
  14. 2026-07-01 15:07 UTCEPSS rescore
  15. 2026-06-30 23:22 UTCEPSS rescore
  16. 2026-06-29 23:35 UTCGHSA enrichment
  17. 2026-06-29 14:06 UTCEPSS rescore
  18. 2026-06-29 14:06 UTCEPSS rescore
  19. 2026-06-28 14:07 UTCEPSS rescore
  20. 2026-06-28 04:56 UTCEPSS rescore
  21. 2026-06-28 04:56 UTCEPSS rescore
  22. 2026-06-27 04:56 UTCGHSA enrichment
  23. 2026-06-27 03:08 UTCEPSS rescore
  24. 2026-06-26 13:44 UTCNVD updateCVSS v3 → 8.2 · severity → HIGH
  25. 2026-06-25 13:49 UTCEPSS rescore
  26. 2026-06-24 14:05 UTCEPSS rescore
  27. 2026-06-24 10:17 UTCGHSA enrichment
  28. 2026-06-23 21:33 UTCEPSS rescore
  29. 2026-06-23 21:33 UTCEPSS rescore
  30. 2026-06-22 19:39 UTCNVD updateCVSS v4 → 6.3 · severity → LOW
  31. 2026-06-21 15:38 UTCEG score recompute
  32. 2026-06-21 15:38 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56378?
CVE-2026-56378 is a high vulnerability published on June 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.
When was CVE-2026-56378 disclosed?
CVE-2026-56378 was first published in the National Vulnerability Database on June 21, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56378 actively exploited?
CVE-2026-56378 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56378?
CVE-2026-56378 has a CVSS v3 base score of 8.2 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 3.7.
How do I remediate CVE-2026-56378?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56378, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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