CVE-2026-76242

CRITICALPre-NVD 9.19.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This critical-severity CVE scores 9.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (28th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source

Also known asEUVD-2026-62406 (ENISA EUVD) · GHSA-rgmr-4wwg-2c6j (GitHub Security Advisories)Source: ENISA EUVD

9.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • 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
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
41
EG Risk 41/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity91% × 45%
Impact severity (EG Severity): CVSS 9.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
28th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.1): severity, escalated by confirmed exploitation. This CVE's 9.1 is its impact severity (EG Severity), not escalated.

EG Severity
9.1 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-13). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 19, 2026

Last Modified

September 11, 2026

Advisory Details (2)

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

stigmem Federation Peer Registration Authentication Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/stigmem-federation-peer-registration-authentication-bypass
GitHub advisoryMentions a patch (unverified)

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 14× in last 7d / 59× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 436 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 336 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 17:19 UTCEchelonGraph re-scored
  2. 2026-11-13 17:19 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  3. 2026-11-13 16:57 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  4. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  5. 2026-11-12 14:38 UTCEchelonGraph re-scored
  6. 2026-11-12 14:38 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  7. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  8. 2026-11-11 12:38 UTCEchelonGraph re-scored
  9. 2026-11-11 12:38 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  10. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  11. 2026-11-10 10:38 UTCEchelonGraph re-scored
  12. 2026-11-10 10:38 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  13. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  14. 2026-11-09 08:39 UTCEchelonGraph re-scored
  15. 2026-11-09 08:39 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  16. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  17. 2026-11-08 06:40 UTCEchelonGraph re-scored
  18. 2026-11-08 06:40 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  19. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  20. 2026-11-07 04:40 UTCEchelonGraph re-scored
  21. 2026-11-07 04:40 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  22. 2026-11-06 17:55 UTCOSV refresh
  23. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  24. 2026-11-06 02:41 UTCEchelonGraph re-scored
  25. 2026-11-06 02:41 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
Show 75 more
  1. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  2. 2026-11-05 00:42 UTCEchelonGraph re-scored
  3. 2026-11-05 00:42 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  4. 2026-11-04 16:36 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  5. 2026-11-03 22:42 UTCEchelonGraph re-scored
  6. 2026-11-03 22:42 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  7. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  8. 2026-11-02 20:43 UTCEchelonGraph re-scored
  9. 2026-11-02 20:43 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  10. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  11. 2026-11-01 18:43 UTCEchelonGraph re-scored
  12. 2026-11-01 18:43 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  13. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  14. 2026-10-31 16:44 UTCEchelonGraph re-scored
  15. 2026-10-31 16:44 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  16. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  17. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  18. 2026-10-30 14:16 UTCEchelonGraph re-scored
  19. 2026-10-30 14:16 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  20. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  21. 2026-10-29 12:17 UTCEchelonGraph re-scored
  22. 2026-10-29 12:17 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  23. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  24. 2026-10-28 10:10 UTCEchelonGraph re-scored
  25. 2026-10-28 10:10 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  26. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  27. 2026-10-27 07:15 UTCEchelonGraph re-scored
  28. 2026-10-27 07:15 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  29. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  30. 2026-10-26 02:10 UTCEchelonGraph re-scored
  31. 2026-10-26 02:10 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  32. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  33. 2026-10-25 14:02 UTCEchelonGraph re-scored
  34. 2026-10-25 00:11 UTCEchelonGraph re-scored
  35. 2026-10-25 00:11 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  36. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  37. 2026-10-23 22:11 UTCEchelonGraph re-scored
  38. 2026-10-23 22:11 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  39. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  40. 2026-10-22 20:09 UTCEchelonGraph re-scored
  41. 2026-10-22 20:09 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  42. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  43. 2026-10-21 18:08 UTCEchelonGraph re-scored
  44. 2026-10-21 18:08 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  45. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  46. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  47. 2026-10-20 16:09 UTCEchelonGraph re-scored
  48. 2026-10-20 16:09 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  49. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  50. 2026-10-19 14:07 UTCEchelonGraph re-scored
  51. 2026-10-19 14:06 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  52. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  53. 2026-10-18 12:04 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  54. 2026-10-18 03:13 UTCEchelonGraph re-scored
  55. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  56. 2026-10-17 10:03 UTCEchelonGraph re-scored
  57. 2026-10-17 10:03 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  58. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  59. 2026-10-16 08:02 UTCEchelonGraph re-scored
  60. 2026-10-16 08:02 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  61. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  62. 2026-10-15 06:03 UTCEchelonGraph re-scored
  63. 2026-10-15 06:02 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  64. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  65. 2026-10-14 01:41 UTCEchelonGraph re-scored
  66. 2026-10-14 01:41 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  67. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  68. 2026-10-12 21:52 UTCEchelonGraph re-scored
  69. 2026-10-12 21:51 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  70. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  71. 2026-10-12 15:38 UTCEchelonGraph re-scored
  72. 2026-10-12 05:33 UTCGHSA enrichmentGHSA-rgmr-4wwg-2c6j · GitHub severity CRITICAL
  73. 2026-10-11 19:24 UTCEchelonGraph re-scored
  74. 2026-10-11 16:40 UTCEchelonGraph re-scored
  75. 2026-10-11 13:59 UTCEchelonGraph re-scored

Frequently asked(5)

What is CVE-2026-76242?
CVE-2026-76242 is a critical-severity vulnerability; its CVE record was 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 made public?
CVE-2026-76242 was made public on May 19, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 19, 2026. EchelonGraph's copy of the record carries a last-modified date of September 11, 2026; the record at its source may have been updated since.
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 (28th 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-76242

Explore →

Is Your Infrastructure Affected by CVE-2026-76242?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.