CVE-2026-51808

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH 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: 0%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(high)
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
0%
EPSS %ILE
39%
KEV
Not listed

Published

July 14, 2026

Last Modified

July 15, 2026

Advisory Details (3)

Auto-updated Jul 25, 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 24× in last 7d / 39× 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. 2026-07-28 17:38 UTCEG score recompute
  2. 2026-07-28 17:38 UTCGHSA enrichment
  3. 2026-07-28 15:37 UTCEPSS rescore
  4. 2026-07-28 13:18 UTCGHSA enrichment
  5. 2026-07-28 09:01 UTCGHSA enrichment
  6. 2026-07-28 04:43 UTCGHSA enrichment
  7. 2026-07-28 00:26 UTCGHSA enrichment
  8. 2026-07-27 19:49 UTCGHSA enrichment
  9. 2026-07-27 15:21 UTCEG score recompute
  10. 2026-07-27 15:21 UTCGHSA enrichment
  11. 2026-07-27 09:22 UTCGHSA enrichment
  12. 2026-07-27 05:05 UTCGHSA enrichment
  13. 2026-07-27 00:48 UTCGHSA enrichment
  14. 2026-07-26 20:26 UTCGHSA enrichment
  15. 2026-07-26 16:10 UTCEG score recompute
  16. 2026-07-26 16:10 UTCGHSA enrichment
  17. 2026-07-26 14:54 UTCEPSS rescore
  18. 2026-07-26 11:50 UTCEG score recompute
  19. 2026-07-26 11:50 UTCGHSA enrichment
  20. 2026-07-25 14:18 UTCEPSS rescore
  21. 2026-07-24 14:18 UTCEPSS rescore
  22. 2026-07-23 14:18 UTCEPSS rescore
  23. 2026-07-23 03:19 UTCEG score recompute
  24. 2026-07-22 14:08 UTCEPSS rescore
  25. 2026-07-21 15:25 UTCEPSS rescore
Show 14 more
  1. 2026-07-20 17:08 UTCEPSS rescore
  2. 2026-07-19 14:31 UTCEPSS rescore
  3. 2026-07-19 14:31 UTCEPSS rescore
  4. 2026-07-19 02:29 UTCEPSS rescore
  5. 2026-07-18 10:04 UTCEPSS rescore
  6. 2026-07-17 06:50 UTCEG score recompute▲ 9.80
  7. 2026-07-17 06:50 UTCGHSA enrichment
  8. 2026-07-16 17:03 UTCEPSS rescore
  9. 2026-07-15 16:57 UTCEPSS rescore
  10. 2026-07-15 16:57 UTCEPSS rescore
  11. 2026-07-15 14:09 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  12. 2026-07-14 23:23 UTCNVD update
  13. 2026-07-14 22:45 UTCEG score recompute
  14. 2026-07-14 22:45 UTCMITRE cvelistV5first tracked

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 0% probability of exploitation in the next 30 days, which ranks it in the top 61.2% 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-51808

Explore →

Is Your Infrastructure Affected by CVE-2026-51808?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs