CVE-2026-67869

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-06. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: 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 open62541 v1.5.5 allows a remote attacker to cause a denial of service via the Service_Call validates input arguments against runtime-resolved InputArguments metadata

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
50(Track)
EG Risk 50/100SSVC: 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
Severity75% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 6, 2026

Advisory Details (4)

Auto-updated Aug 5, 2026
No patch confirmed yet.
generic

open62541/examples/tutorial_server_alarms_conditions.c at v1.5.5 · open62541/open62541 · GitHub

https://github.com/open62541/open62541/blob/v1.5.5/examples/tutorial_server_alarms_conditions.c
generic

open62541/src/server/ua_subscription_alarms_conditions.c at v1.5.5 · open62541/open62541 · GitHub

https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_subscription_alarms_conditions.c
generic

open62541/src/server/ua_services_method.c at v1.5.5 · open62541/open62541 · GitHub

https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_method.c
generic

Server-side type confusion in built-in Acknowledge method allows `heap-buffer-overflow read` and `DoS` · Issue #8171 · open62541/open62541 · GitHub

https://github.com/open62541/open62541/issues/8171

Vendor Advisories for CVE-2026-67869(1)

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

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
open625411.4.11.1-1, 1.4.18-1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
open625411.4.11.1-1, 1.4.18-1——

Weakness Classification(1)

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

Data Freshness Timeline

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

Frequently asked(5)

What is CVE-2026-67869?
CVE-2026-67869 is a high vulnerability published on August 5, 2026. Buffer Overflow vulnerability in open62541 v1.5.5 allows a remote attacker to cause a denial of service via the Service_Call validates input arguments against runtime-resolved InputArguments metadata
When was CVE-2026-67869 disclosed?
CVE-2026-67869 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67869 actively exploited?
CVE-2026-67869 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 61.3% of all scored CVEs.
What is the CVSS score of CVE-2026-67869?
CVE-2026-67869 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-67869?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67869, 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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