CVE-2026-86421

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 63% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

ImageMagick before 7.1.2-30 and 6.9.13-55 contains a memory leak in the MSL image decoder. A crafted MSL image triggers memory allocation without proper deallocation, allowing an attacker to exhaust memory and cause a denial of service.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

September 7, 2026

Last Modified

September 9, 2026

Advisory Details (2)

Auto-updated Sep 9, 2026
Patch available. Sources: github.
generic

ImageMagick before 7.1.2-30 Memory Leak via MSL decoder | Advisories | VulnCheck

https://www.vulncheck.com/advisories/imagemagick-before-7.1.2-30-memory-leak-via-msl-decoder
github Patch Available

Memory Leak in MSL decoder · Advisory · ImageMagick/ImageMagick · GitHub

https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-4jv7-q6xw-6f4x

Vendor Advisories for CVE-2026-86421(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
imagemagick8:6.9.11.60+dfsg-1.6 ... 8:7.1.2.8+dfsg1-1 (54 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
imagemagick8:7.1.1.43+dfsg1-1 ... 8:7.1.2.8+dfsg1-1 (35 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
imagemagick8:7.1.1.43+dfsg1-1 ... 8:7.1.2.8+dfsg1-1 (23 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 68× 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. 2026-09-25 01:31 UTCEG score recompute
  2. 2026-09-25 01:31 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 12:51 UTCGHSA enrichment
  5. 2026-09-24 00:10 UTCEG score recompute
  6. 2026-09-24 00:10 UTCGHSA enrichment
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-23 11:30 UTCGHSA enrichment
  9. 2026-09-22 22:50 UTCEG score recompute
  10. 2026-09-22 22:50 UTCGHSA enrichment
  11. 2026-09-22 16:01 UTCEPSS rescore
  12. 2026-09-22 10:11 UTCGHSA enrichment
  13. 2026-09-21 21:30 UTCEG score recompute
  14. 2026-09-21 21:30 UTCGHSA enrichment
  15. 2026-09-21 21:09 UTCEPSS rescore
  16. 2026-09-21 08:50 UTCEG score recompute
  17. 2026-09-21 08:50 UTCGHSA enrichment
  18. 2026-09-20 20:16 UTCEPSS rescore
  19. 2026-09-20 19:48 UTCGHSA enrichment
  20. 2026-09-20 07:08 UTCGHSA enrichment
  21. 2026-09-19 18:20 UTCEG score recompute
  22. 2026-09-19 18:20 UTCGHSA enrichment
  23. 2026-09-19 05:40 UTCEG score recompute
  24. 2026-09-19 05:40 UTCGHSA enrichment
  25. 2026-09-18 19:28 UTCEPSS rescore
Show 43 more
  1. 2026-09-18 16:59 UTCGHSA enrichment
  2. 2026-09-18 04:19 UTCEG score recompute
  3. 2026-09-18 04:19 UTCGHSA enrichment
  4. 2026-09-17 19:32 UTCEPSS rescore
  5. 2026-09-17 15:39 UTCGHSA enrichment
  6. 2026-09-17 02:58 UTCGHSA enrichment
  7. 2026-09-16 14:10 UTCEG score recompute
  8. 2026-09-16 14:10 UTCGHSA enrichment
  9. 2026-09-16 14:09 UTCEPSS rescore
  10. 2026-09-16 05:15 UTCEPSS rescore
  11. 2026-09-16 01:30 UTCGHSA enrichment
  12. 2026-09-15 12:50 UTCEG score recompute
  13. 2026-09-15 12:50 UTCGHSA enrichment
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-15 00:10 UTCGHSA enrichment
  17. 2026-09-14 11:30 UTCGHSA enrichment
  18. 2026-09-13 22:49 UTCEG score recompute
  19. 2026-09-13 22:49 UTCGHSA enrichment
  20. 2026-09-13 10:10 UTCGHSA enrichment
  21. 2026-09-12 21:30 UTCEG score recompute
  22. 2026-09-12 21:29 UTCGHSA enrichment
  23. 2026-09-12 08:49 UTCGHSA enrichment
  24. 2026-09-11 20:09 UTCEG score recompute
  25. 2026-09-11 20:09 UTCGHSA enrichment
  26. 2026-09-11 14:53 UTCEPSS rescore
  27. 2026-09-11 14:53 UTCEPSS rescore
  28. 2026-09-11 07:09 UTCGHSA enrichment
  29. 2026-09-10 18:29 UTCEG score recompute
  30. 2026-09-10 18:28 UTCGHSA enrichment
  31. 2026-09-10 05:48 UTCGHSA enrichment
  32. 2026-09-09 17:08 UTCEG score recompute▲ 3.80
  33. 2026-09-09 17:08 UTCGHSA enrichment
  34. 2026-09-09 17:07 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  35. 2026-09-08 22:01 UTCEPSS rescore
  36. 2026-09-08 20:13 UTCGHSA enrichment
  37. 2026-09-08 14:50 UTCEG score recompute
  38. 2026-09-08 14:50 UTCGHSA enrichment
  39. 2026-09-08 13:59 UTCEG score recompute
  40. 2026-09-08 13:59 UTCGHSA enrichment
  41. 2026-09-07 13:31 UTCEG score recompute
  42. 2026-09-07 12:58 UTCEG score recompute
  43. 2026-09-07 12:56 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86421?
CVE-2026-86421 is a high vulnerability published on September 7, 2026. ImageMagick before 7.1.2-30 and 6.9.13-55 contains a memory leak in the MSL image decoder. A crafted MSL image triggers memory allocation without proper deallocation, allowing an attacker to exhaust memory and cause a denial of service.
When was CVE-2026-86421 disclosed?
CVE-2026-86421 was first published in the National Vulnerability Database on September 7, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86421 actively exploited?
CVE-2026-86421 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 62.8% of all scored CVEs.
What is the CVSS score of CVE-2026-86421?
CVE-2026-86421 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-86421?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86421, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-86421

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