CVE-2026-67861

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-05. 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.

An issue in open62541 v.1.5.5 and before allows a remote attacker to cause a denial of service via the UA_Client_getRemoteDataTypes component

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
35%
KEV
Not listed

Published

August 4, 2026

Last Modified

August 5, 2026

Advisory Details (3)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic
https://raw.githubusercontent.com/open62541/open62541/v1.5.5/src/client/ua_client_util.c
generic
https://raw.githubusercontent.com/open62541/open62541/v1.5.5/examples/custom_datatype/client_types_custom.c
generic

open62541 client stack overflow in `UA_Client_getRemoteDataTypes` via unbounded recursive `HasSubtype` traversal · Issue #8140 · open62541/open62541 · GitHub

https://github.com/open62541/open62541/issues/8140

Vendor Advisories for CVE-2026-67861(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 29× in last 7d / 69× 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 09:39 UTCGHSA enrichment
  2. 2026-08-19 22:38 UTCEG score recompute
  3. 2026-08-19 22:38 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 11:37 UTCGHSA enrichment
  6. 2026-08-19 00:35 UTCEG score recompute
  7. 2026-08-19 00:35 UTCGHSA enrichment
  8. 2026-08-18 13:48 UTCEPSS rescore
  9. 2026-08-18 13:25 UTCGHSA enrichment
  10. 2026-08-18 02:24 UTCGHSA enrichment
  11. 2026-08-17 15:16 UTCEG score recompute
  12. 2026-08-17 15:16 UTCGHSA enrichment
  13. 2026-08-17 13:47 UTCEPSS rescore
  14. 2026-08-17 04:15 UTCGHSA enrichment
  15. 2026-08-16 17:14 UTCEG score recompute
  16. 2026-08-16 17:14 UTCGHSA enrichment
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-16 06:12 UTCEG score recompute
  19. 2026-08-16 06:12 UTCGHSA enrichment
  20. 2026-08-15 19:11 UTCGHSA enrichment
  21. 2026-08-15 08:10 UTCEG score recompute
  22. 2026-08-15 08:10 UTCGHSA enrichment
  23. 2026-08-15 01:30 UTCEPSS rescore
  24. 2026-08-14 21:08 UTCGHSA enrichment
  25. 2026-08-14 10:07 UTCGHSA enrichment
Show 44 more
  1. 2026-08-13 23:06 UTCEG score recompute
  2. 2026-08-13 23:06 UTCGHSA enrichment
  3. 2026-08-13 22:00 UTCEPSS rescore
  4. 2026-08-13 12:05 UTCGHSA enrichment
  5. 2026-08-13 01:04 UTCGHSA enrichment
  6. 2026-08-12 14:03 UTCEG score recompute
  7. 2026-08-12 14:03 UTCGHSA enrichment
  8. 2026-08-12 13:51 UTCEPSS rescore
  9. 2026-08-12 03:01 UTCGHSA enrichment
  10. 2026-08-11 16:00 UTCEG score recompute
  11. 2026-08-11 16:00 UTCGHSA enrichment
  12. 2026-08-11 04:59 UTCEG score recompute
  13. 2026-08-11 04:59 UTCGHSA enrichment
  14. 2026-08-11 00:00 UTCEPSS rescore
  15. 2026-08-10 17:58 UTCGHSA enrichment
  16. 2026-08-10 06:44 UTCGHSA enrichment
  17. 2026-08-09 19:43 UTCEG score recompute
  18. 2026-08-09 19:43 UTCGHSA enrichment
  19. 2026-08-09 13:47 UTCEPSS rescore
  20. 2026-08-09 08:42 UTCGHSA enrichment
  21. 2026-08-08 21:41 UTCEG score recompute
  22. 2026-08-08 21:41 UTCGHSA enrichment
  23. 2026-08-08 16:37 UTCEPSS rescore
  24. 2026-08-08 10:39 UTCGHSA enrichment
  25. 2026-08-07 23:38 UTCEG score recompute
  26. 2026-08-07 23:38 UTCGHSA enrichment
  27. 2026-08-07 12:37 UTCGHSA enrichment
  28. 2026-08-07 01:36 UTCGHSA enrichment
  29. 2026-08-06 14:35 UTCEG score recompute
  30. 2026-08-06 14:35 UTCGHSA enrichment
  31. 2026-08-06 13:47 UTCEPSS rescore
  32. 2026-08-06 03:33 UTCEG score recompute
  33. 2026-08-06 03:33 UTCGHSA enrichment
  34. 2026-08-05 19:17 UTCEPSS rescore
  35. 2026-08-05 19:17 UTCEPSS rescore
  36. 2026-08-05 16:32 UTCEG score recompute
  37. 2026-08-05 16:32 UTCGHSA enrichment
  38. 2026-08-05 15:30 UTCEG score recompute
  39. 2026-08-05 15:30 UTCGHSA enrichment
  40. 2026-08-05 09:46 UTCEG score recompute
  41. 2026-08-05 09:46 UTCGHSA enrichment
  42. 2026-08-04 22:32 UTCEG score recompute
  43. 2026-08-04 21:43 UTCEG score recompute
  44. 2026-08-04 21:40 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-67861?
CVE-2026-67861 is a high vulnerability published on August 4, 2026. An issue in open62541 v.1.5.5 and before allows a remote attacker to cause a denial of service via the UAClientgetRemoteDataTypes component
When was CVE-2026-67861 disclosed?
CVE-2026-67861 was first published in the National Vulnerability Database on August 4, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67861 actively exploited?
CVE-2026-67861 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 65.0% of all scored CVEs.
What is the CVSS score of CVE-2026-67861?
CVE-2026-67861 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-67861?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67861, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-67861

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