CVE-2026-52491

HIGHPre-NVD 8.48.4—
EchelonGraph scoreHIGH confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-08-25. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.4Exploit: None knownExposed: 0

A fix is available — apply it.

An issue in libtiff 85f2ac8e0b01cb7db2bbecf4a3b891bdbef67938 allows an attacker to execute arbitrary code via the libtiff/tools/thumbnail.c: main() component

CVSS v3
8.4
EG Score
8.4(high)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity84% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

August 25, 2026

Last Modified

September 9, 2026

Advisory Details (2)

Auto-updated Aug 31, 2026
No patch confirmed yet.
generic

CVE-2026-52491.txt · GitHub

https://gist.github.com/okyfh/5cc53fa67d229017231cf18c91768bd9
generic

fix oob write in thumbnail (#790) (9ce4d089) · Commits · libtiff / libtiff · GitLab

https://gitlab.com/libtiff/libtiff/-/commit/9ce4d089bcf25496663776d9e6336738112f09a3

Vendor Advisories for CVE-2026-52491(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatlibtiff-main-4.7.2-2.hum12026-08-11redhat

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 rangeFixed inDependents
tiff4.5.0-6 ... 4.7.2-1 (23 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
tiff4.7.0-3 ... 4.7.2-1 (10 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
tiff4.7.0-3 ... 4.7.1-3 (6 versions)4.7.2-1—

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 36× in last 7d / 124× 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 124 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-52491?
CVE-2026-52491 is a high vulnerability published on August 25, 2026. An issue in libtiff 85f2ac8e0b01cb7db2bbecf4a3b891bdbef67938 allows an attacker to execute arbitrary code via the libtiff/tools/thumbnail.c: main() component
When was CVE-2026-52491 disclosed?
CVE-2026-52491 was first published in the National Vulnerability Database on August 25, 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-2026-52491 actively exploited?
CVE-2026-52491 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 96.2% of all scored CVEs.
What is the CVSS score of CVE-2026-52491?
CVE-2026-52491 has a CVSS v3.1 base score of 8.4 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-52491?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52491, 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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