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%, top 81% of all CVEs by exploit prediction. 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%CVSS: 9.1Exploit: None knownExposed: 0

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

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
9.1(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

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 rangeFixed inDependents
stigmem-node0.9.0a10.9.0a2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 49× in last 7d / 213× 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 221 total refreshes for this CVE.

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

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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 80.9% of all scored CVEs.
What is the CVSS score of CVE-2026-76242?
CVE-2026-76242 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-76242?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-76242, 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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