CVE-2026-86421

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.5% (39th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 3.7 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-09-07) is not newer than that change (2026-10-29), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week

Also known asEUVD-2026-72379 (ENISA EUVD) · GHSA-vv85-m77w-hhgx (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
7.5HIGHmedium confidence
EG Risk
34
EG Risk 34/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 7, 2026

Last Modified

October 29, 2026

Advisory Details (2)

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

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 advisoryMentions a patch (unverified)

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 rangeFix by version rangeDependents
imagemagick8:6.9.11.60+dfsg-1.6 ... 8:7.1.2.8+dfsg1-1 (55 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
imagemagick8:7.1.1.43+dfsg1-1 ... 8:7.1.2.8+dfsg1-1 (36 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
imagemagick8:7.1.1.43+dfsg1-1 ... 8:7.1.2.8+dfsg1-1 (23 versions)
  • every version up to 8:7.1.2.31+dfsg1-1: fixed in 8:7.1.2.31+dfsg1-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 62× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 159 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 59 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  3. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  4. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  5. 2026-10-29 21:26 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  6. 2026-10-29 20:27 UTCEG score recompute
  7. 2026-10-29 20:27 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  8. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  9. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  10. 2026-10-27 17:23 UTCEG score recompute
  11. 2026-10-27 17:23 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  12. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  13. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  14. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  15. 2026-10-25 13:54 UTCEG score recompute
  16. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  17. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  18. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  19. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  20. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  21. 2026-10-19 17:05 UTCEG score recompute
  22. 2026-10-19 17:04 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  23. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  24. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  25. 2026-10-18 03:04 UTCEG score recompute
Show 75 more
  1. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  2. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  3. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  4. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  5. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  6. 2026-10-13 05:20 UTCEG score recompute
  7. 2026-10-13 05:19 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  8. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  9. 2026-10-12 14:51 UTCEG score recompute
  10. 2026-10-11 19:17 UTCEG score recompute
  11. 2026-10-11 16:33 UTCEG score recompute
  12. 2026-10-11 13:51 UTCEG score recompute
  13. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  14. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  15. 2026-10-10 11:25 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  16. 2026-10-09 22:45 UTCEG score recompute
  17. 2026-10-09 22:45 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  18. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  19. 2026-10-09 00:53 UTCEG score recompute
  20. 2026-10-09 00:52 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  21. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  22. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  23. 2026-10-07 22:40 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  24. 2026-10-07 07:48 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  25. 2026-10-06 19:08 UTCEG score recompute
  26. 2026-10-06 19:08 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  27. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  28. 2026-10-06 06:21 UTCEG score recompute
  29. 2026-10-06 06:21 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  30. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  31. 2026-10-05 16:37 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  32. 2026-10-05 02:27 UTCEG score recompute
  33. 2026-10-05 02:27 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  34. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  35. 2026-10-04 13:47 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  36. 2026-10-04 01:07 UTCEG score recompute
  37. 2026-10-04 01:07 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  38. 2026-10-03 12:25 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  39. 2026-10-02 18:50 UTCEG score recompute
  40. 2026-10-02 18:50 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  41. 2026-10-02 06:10 UTCEG score recompute
  42. 2026-10-02 06:10 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  43. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  44. 2026-10-01 17:29 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  45. 2026-10-01 03:59 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  46. 2026-09-30 15:19 UTCEG score recompute
  47. 2026-09-30 15:19 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  48. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  49. 2026-09-30 02:31 UTCEG score recompute
  50. 2026-09-30 02:31 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  51. 2026-09-29 07:43 UTCEG score recompute
  52. 2026-09-29 07:43 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  53. 2026-09-28 19:03 UTCEG score recompute
  54. 2026-09-28 19:03 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  55. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  56. 2026-09-28 05:31 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  57. 2026-09-27 16:52 UTCEG score recompute
  58. 2026-09-27 16:52 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  59. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  60. 2026-09-27 04:12 UTCEG score recompute
  61. 2026-09-27 04:12 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  62. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  63. 2026-09-26 15:31 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  64. 2026-09-26 02:50 UTCEG score recompute
  65. 2026-09-26 02:50 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  66. 2026-09-25 14:10 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  67. 2026-09-25 01:31 UTCEG score recompute
  68. 2026-09-25 01:31 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  69. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  70. 2026-09-24 12:51 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  71. 2026-09-24 00:10 UTCEG score recompute
  72. 2026-09-24 00:10 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  73. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  74. 2026-09-23 11:30 UTCGHSA enrichmentGHSA-vv85-m77w-hhgx · GitHub CVSS 3.7
  75. 2026-09-22 22:50 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86421?
CVE-2026-86421 is a high-severity vulnerability; its CVE record was 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 made public?
CVE-2026-86421 was made public on August 23, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on September 7, 2026. EchelonGraph's copy of the record carries a last-modified date of October 29, 2026; the record at its source may have been updated since.
Is CVE-2026-86421 actively exploited?
CVE-2026-86421 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-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?
A fix for CVE-2026-86421 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-86421 are linked in the Vendor Advisories panel on this page.

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