CVE-2026-42590

HIGHNVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-05-07. NVD baseline CVSS 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
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.

Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.30.0, The ExifTool metadata write blocklist in Gotenberg can be bypassed using ExifTool's group-prefix syntax, enabling arbitrary file rename, move, hardlink, and symlink creation on the server. ExifTool supports group-prefix syntax where File:FileName is processed identically to FileName -- the prefix is stripped by SetNewValue in Writer.pl before tag matching. The safeKeyPattern regex (^[a-zA-Z0-9\-_.:]+$) allows colons, so prefixed tag names pass validation. Any prefix works: File:FileName, System:Directory, a:HardLink, etc. Additionally, FilePermissions, FileUserID, and FileGroupID pseudo-tags are not blocked at all and can modify file attributes without any prefix. This vulnerability is fixed in 8.30.0.

CVSS v3
8.2
EG Score
8.2(medium)
EPSS
20.8%
KEV
Not listed

Published

May 14, 2026

Last Modified

May 18, 2026

Advisory Details (1)

Auto-updated May 14, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

ExifTool group-prefix syntax bypasses dangerous-tag blocklist · Advisory · gotenberg/gotenberg · GitHub

https://github.com/gotenberg/gotenberg/security/advisories/GHSA-7v3r-m9c8-r855

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
gogithub.com/gotenberg/gotenberg/v8—ghsa

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

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/gotenberg/gotenberg/v8———

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 66× 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 149 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-42590?
CVE-2026-42590 is a high vulnerability published on May 14, 2026. Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.30.0, The ExifTool metadata write blocklist in Gotenberg can be bypassed using ExifTool's group-prefix syntax, enabling arbitrary file rename, move, hardlink, and symlink creation on the server. ExifTool supports group-prefix…
When was CVE-2026-42590 disclosed?
CVE-2026-42590 was first published in the National Vulnerability Database on May 14, 2026, with the most recent update on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42590 actively exploited?
CVE-2026-42590 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42590?
CVE-2026-42590 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-42590?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42590, 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.

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