CVE-2026-51808

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-15. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

Buffer Overflow vulnerability in OpenHTJ2K v.0.18.4 and before allows an attacker to execute arbitrary code via the openhtj2k_decoder_impl::invoke, invoke_line_based, invoke_line_based_stream, and invoke_line_based_predecoded function in source/core/interface/decoder.cpp

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
55%
KEV
Not listed

Published

July 14, 2026

Last Modified

July 15, 2026

Advisory Details (3)

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

fix: validate SOT tile index to prevent heap OOB info leak (CVE-2026-TBD)

Patch available: osamu620/OpenHTJ2K v0.18.5 (PR #320 merged 2026-04-28)

https://github.com/osamu620/OpenHTJ2K/pull/320
github_release Patch Available

v0.18.5 - Security Fix: SOT Out-of-Bounds Tile Index Heap Info Leak

Patch available: osamu620/OpenHTJ2K v0.18.5

https://github.com/osamu620/OpenHTJ2K/releases/tag/v0.18.5
generic

OpenHTJ2K/CHANGELOG at main · osamu620/OpenHTJ2K · GitHub

https://github.com/osamu620/OpenHTJ2K/blob/main/CHANGELOG

Vendor Advisories for CVE-2026-51808(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 33× in last 7d / 201× 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 259 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-51808?
CVE-2026-51808 is a critical vulnerability published on July 14, 2026. Buffer Overflow vulnerability in OpenHTJ2K v.0.18.4 and before allows an attacker to execute arbitrary code via the openhtj2kdecoderimpl::invoke, invokelinebased, invokelinebasedstream, and invokelinebasedpredecoded function in source/core/interface/decoder.cpp
When was CVE-2026-51808 disclosed?
CVE-2026-51808 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-51808 actively exploited?
CVE-2026-51808 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 44.8% of all scored CVEs.
What is the CVSS score of CVE-2026-51808?
CVE-2026-51808 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51808?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-51808, 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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