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 mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.1%CVSS: 9.8Exploit: Elevated riskExposed services: Not assessed

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

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
9.8CRITICALmedium confidence
EG Risk
60
EG Risk 60/100CISA SSVC

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%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
1.1%
EPSS %ILE
63rd
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 5, 2026

Last Modified

August 31, 2026

Advisory Details (4)

Auto-updated Sep 28, 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 rangeFix by version rangeDependents
open625411.4.11.1-1, 1.4.18-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
open625411.4.11.1-1, 1.4.18-1
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 137× 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 341 total refreshes for this CVE.

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

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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 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 1.1% probability of exploitation in the next 30 days (63rd percentile of EPSS-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?
No fix for CVE-2026-67870 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-67870 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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