CVE-2026-18300

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-20. A secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

GIMP HDR File Parsing Integer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of HDR files. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29289.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100CISA SSVC

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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
24th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 20, 2026

Last Modified

September 2, 2026

Advisory Details (2)

Auto-updated Aug 20, 2026
Patch available.
generic

Client Challenge

https://gitlab.gnome.org/GNOME/gegl/-/commit/d3d262008299341c5b032b354021632ceadb2799
generic

ZDI-26-453 - TrendAI™ Zero Day Initiative™ (ZDI)

https://www.zerodayinitiative.com/advisories/ZDI-26-453/

Vendor Advisories for CVE-2026-18300(3)

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

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatgegl04-0:0.4.4-7.el8_10.12026-09-02redhat
redhatgegl-0:0.2.0-40.el8_10.12026-09-02redhat
redhatgegl04-0:0.4.62-1.el9_8.22026-09-01redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
gegl1:0.4.42-2 ... 1:0.4.72-2 (39 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
gegl1:0.4.62-2 ... 1:0.4.72-2 (17 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
gegl1:0.4.62-2 ... 1:0.4.70-4 (13 versions)
  • every version up to 1:0.4.72-1: fixed in 1:0.4.72-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 40× in last 7d / 166× 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.

Showing the most recent 100 of 240 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-18300?
CVE-2026-18300 is a high vulnerability published on August 20, 2026. GIMP HDR File Parsing Integer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a…
When was CVE-2026-18300 disclosed?
CVE-2026-18300 was first published on August 20, 2026, with the most recent update on September 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18300 actively exploited?
CVE-2026-18300 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (24th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18300?
CVE-2026-18300 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18300?
A fix for CVE-2026-18300 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-18300 are linked in the Vendor Advisories panel on this page.

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