CVE-2026-67870

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-06. 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.

In open62541 v1.5.5, the server-side AddReferences implementation contains an incomplete validation flaw for non-local ExpandedNodeId targets. A remote attacker can send a crafted AddReferencesRequest with an empty targetServerUri and a non-zero targetNodeId.serverIndex, causing the target node pointer to remain NULL while execution continues.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track*)
EG Risk 60/100SSVC: 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
Severity98% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 31, 2026

Advisory Details (4)

Auto-updated Sep 14, 2026
No patch confirmed yet.
generic

Server-side `NULL pointer dereference` in `Service_AddReferences` via non-local `ExpandedNodeId` target · Issue #8172 · open62541/open62541 · GitHub

https://github.com/open62541/open62541/issues/8172
generic

open62541/src/ua_types.c at v1.5.5 · open62541/open62541 · GitHub

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

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

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

open62541/include/open62541/types.h at v1.5.5 · open62541/open62541 · GitHub

https://github.com/open62541/open62541/blob/v1.5.5/include/open62541/types.h

Vendor Advisories for CVE-2026-67870(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 39× in last 7d / 171× 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 289 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-67870?
CVE-2026-67870 is a critical vulnerability published on August 5, 2026. In open62541 v1.5.5, the server-side AddReferences implementation contains an incomplete validation flaw for non-local ExpandedNodeId targets. A remote attacker can send a crafted AddReferencesRequest with an empty targetServerUri and a non-zero targetNodeId.serverIndex, causing the target node…
When was CVE-2026-67870 disclosed?
CVE-2026-67870 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67870 actively exploited?
CVE-2026-67870 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 54.2% of all scored CVEs.
What is the CVSS score of CVE-2026-67870?
CVE-2026-67870 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-67870?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67870, 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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