CVE-2026-76242

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (25th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 9.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

stigmem-node 0.9.0a1 accepts federation peer key material during peer registration without a separate administrator out-of-band fingerprint approval step. On nodes that accept federation peer registration over a network where initial registration can be intercepted or misdirected, an attacker can register a malicious peer and gain access to or tamper with federation traffic. Fixed in 0.9.0a2, which introduces a pending approval flow requiring administrator fingerprint verification before peer tokens are accepted.

CVSS v3
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
41
EG Risk 41/100CISA 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
Severity91% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
25th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (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 19, 2026

Last Modified

September 11, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
Patch available. Sources: github.
generic

stigmem Federation Peer Registration Authentication Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/stigmem-federation-peer-registration-authentication-bypass
github Patch Available

Federation peer registration lacked explicit out-of-band approval · Advisory · eidetic-labs/stigmem · GitHub

Affected: 0.9.0a2. Peer registration now uses a pending approval flow, and peer tokens are

https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-9vp8-3hmv-8fgh

Vendor Advisories for CVE-2026-76242(1)

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

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
stigmem-node0.9.0a1
  • every version up to 0.9.0a2: fixed in 0.9.0a2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 41× in last 7d / 187× 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 316 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-76242?
CVE-2026-76242 is a critical vulnerability published on August 19, 2026. stigmem-node 0.9.0a1 accepts federation peer key material during peer registration without a separate administrator out-of-band fingerprint approval step. On nodes that accept federation peer registration over a network where initial registration can be intercepted or misdirected, an attacker can…
When was CVE-2026-76242 disclosed?
CVE-2026-76242 was first published on August 19, 2026, with the most recent update on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76242 actively exploited?
CVE-2026-76242 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-76242?
CVE-2026-76242 has a CVSS base score of 9.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-76242?
A fix for CVE-2026-76242 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-76242 are linked in the Vendor Advisories panel on this page.

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