CVE-2026-82481

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 58% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.7Exploit: None knownExposed: 0

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

The cohttp package before 6.3.0 for OCaml allows directory traversal.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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
Severity87% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

August 29, 2026

Last Modified

September 1, 2026

Advisory Details (1)

Auto-updated Aug 29, 2026
Patch available. Sources: github_pr.
github_pr Patch Available

cohttp: urldecode before resolving path components for files

Patch available: mirage/ocaml-cohttp v6.3.0 (PR #1145 merged 2026-08-20)

https://github.com/mirage/ocaml-cohttp/pull/1145

Vendor Advisories for CVE-2026-82481(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
ocaml-cohttp4.0.0-3 ... 6.2.2-1 (10 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
ocaml-cohttp5.3.0-1 ... 6.2.2-1 (7 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
ocaml-cohttp5.3.0-1 ... 6.2.2-1 (7 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 27× in last 7d / 86× 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. 2026-09-19 07:20 UTCGHSA enrichment
  2. 2026-09-18 19:52 UTCEG score recompute
  3. 2026-09-18 19:52 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 08:23 UTCGHSA enrichment
  6. 2026-09-17 20:49 UTCEG score recompute
  7. 2026-09-17 20:49 UTCGHSA enrichment
  8. 2026-09-17 06:47 UTCGHSA enrichment
  9. 2026-09-16 18:51 UTCEG score recompute
  10. 2026-09-16 18:50 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 05:55 UTCEG score recompute
  13. 2026-09-16 05:55 UTCGHSA enrichment
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-15 18:27 UTCGHSA enrichment
  16. 2026-09-15 06:42 UTCEG score recompute
  17. 2026-09-15 06:42 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-14 19:13 UTCGHSA enrichment
  21. 2026-09-14 07:44 UTCGHSA enrichment
  22. 2026-09-13 20:15 UTCEG score recompute
  23. 2026-09-13 20:15 UTCGHSA enrichment
  24. 2026-09-13 08:46 UTCGHSA enrichment
  25. 2026-09-12 21:18 UTCEG score recompute
Show 61 more
  1. 2026-09-12 21:18 UTCGHSA enrichment
  2. 2026-09-12 09:49 UTCGHSA enrichment
  3. 2026-09-11 22:21 UTCEG score recompute
  4. 2026-09-11 22:20 UTCGHSA enrichment
  5. 2026-09-11 14:53 UTCEPSS rescore
  6. 2026-09-11 14:53 UTCEPSS rescore
  7. 2026-09-11 10:50 UTCEG score recompute
  8. 2026-09-11 10:50 UTCGHSA enrichment
  9. 2026-09-10 23:13 UTCGHSA enrichment
  10. 2026-09-10 11:45 UTCEG score recompute
  11. 2026-09-10 11:45 UTCGHSA enrichment
  12. 2026-09-09 23:51 UTCGHSA enrichment
  13. 2026-09-09 11:53 UTCGHSA enrichment
  14. 2026-09-09 00:24 UTCEG score recompute
  15. 2026-09-09 00:24 UTCGHSA enrichment
  16. 2026-09-08 22:01 UTCEPSS rescore
  17. 2026-09-08 07:57 UTCGHSA enrichment
  18. 2026-09-07 20:28 UTCEG score recompute
  19. 2026-09-07 20:28 UTCGHSA enrichment
  20. 2026-09-07 08:59 UTCGHSA enrichment
  21. 2026-09-06 21:26 UTCEG score recompute
  22. 2026-09-06 21:26 UTCGHSA enrichment
  23. 2026-09-06 13:48 UTCEPSS rescore
  24. 2026-09-06 09:56 UTCGHSA enrichment
  25. 2026-09-05 22:27 UTCEG score recompute
  26. 2026-09-05 22:27 UTCGHSA enrichment
  27. 2026-09-05 15:31 UTCEPSS rescore
  28. 2026-09-05 10:58 UTCGHSA enrichment
  29. 2026-09-04 23:30 UTCEG score recompute
  30. 2026-09-04 23:30 UTCGHSA enrichment
  31. 2026-09-04 10:56 UTCEG score recompute
  32. 2026-09-04 10:55 UTCGHSA enrichment
  33. 2026-09-04 05:07 UTCEPSS rescore
  34. 2026-09-03 23:22 UTCGHSA enrichment
  35. 2026-09-03 11:48 UTCGHSA enrichment
  36. 2026-09-03 00:16 UTCEG score recompute
  37. 2026-09-03 00:16 UTCGHSA enrichment
  38. 2026-09-02 14:12 UTCEPSS rescore
  39. 2026-09-02 12:44 UTCGHSA enrichment
  40. 2026-09-02 01:15 UTCEG score recompute
  41. 2026-09-02 01:14 UTCGHSA enrichment
  42. 2026-09-01 13:54 UTCEPSS rescore
  43. 2026-09-01 13:42 UTCEG score recompute
  44. 2026-09-01 13:42 UTCGHSA enrichment
  45. 2026-09-01 12:51 UTCEG score recompute
  46. 2026-09-01 12:51 UTCGHSA enrichment
  47. 2026-09-01 08:38 UTCEG score recompute
  48. 2026-09-01 08:38 UTCGHSA enrichment
  49. 2026-09-01 04:40 UTCEPSS rescore
  50. 2026-09-01 04:40 UTCEPSS rescore
  51. 2026-08-31 21:09 UTCGHSA enrichment
  52. 2026-08-31 13:40 UTCGHSA enrichment
  53. 2026-08-31 01:52 UTCEG score recompute
  54. 2026-08-31 01:52 UTCGHSA enrichment
  55. 2026-08-30 19:18 UTCEPSS rescore
  56. 2026-08-30 19:17 UTCEPSS rescore
  57. 2026-08-30 14:24 UTCGHSA enrichment
  58. 2026-08-30 02:53 UTCGHSA enrichment
  59. 2026-08-29 15:24 UTCEG score recompute
  60. 2026-08-29 14:49 UTCEG score recompute
  61. 2026-08-29 14:47 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-82481?
CVE-2026-82481 is a high vulnerability published on August 29, 2026. The cohttp package before 6.3.0 for OCaml allows directory traversal.
When was CVE-2026-82481 disclosed?
CVE-2026-82481 was first published in the National Vulnerability Database on August 29, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82481 actively exploited?
CVE-2026-82481 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 57.9% of all scored CVEs.
What is the CVSS score of CVE-2026-82481?
CVE-2026-82481 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-82481?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82481, 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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