CVE-2026-89042

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-10. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, 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.

passport-saml-encrypted through 0.1.13 makes SAML signature verification conditional on an optional cert option, allowing attackers to bypass authentication by submitting unsigned SAML responses. Attackers can post forged SAML responses with arbitrary NameID and attributes to the assertion consumer service endpoint to receive authenticated profiles without valid signatures.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

September 10, 2026

Last Modified

September 11, 2026

Advisory Details (5)

Auto-updated Sep 15, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

passport-saml-encrypted through 0.1.13 Authentication Bypass via Missing Signature Verification | Advisories | VulnCheck

https://www.vulncheck.com/advisories/passport-saml-encrypted-through-0.1.13-authentication-bypass-via-missing-signature-verification
generic🟡 PoC Available

passport-saml-encrypted authentication bypass missing cert · Issue #29 · krakenjs/passport-saml-encrypted · GitHub

https://github.com/krakenjs/passport-saml-encrypted/issues/29
generic

passport-saml-encrypted/lib/saml.js at v0.1.13 · krakenjs/passport-saml-encrypted · GitHub

https://github.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js#L321
generic

passport-saml-encrypted/lib/saml.js at v0.1.13 · krakenjs/passport-saml-encrypted · GitHub

https://github.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js#L296
generic

GitHub - krakenjs/passport-saml-encrypted: A strategy for Passport authentication that supports encrypted SAML responses · GitHub

https://github.com/krakenjs/passport-saml-encrypted

Vendor Advisories for CVE-2026-89042(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 55× in last 7d / 81× 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.

  1. 2026-09-19 19:54 UTCGHSA enrichment
  2. 2026-09-19 15:58 UTCEG score recompute
  3. 2026-09-19 15:58 UTCGHSA enrichment
  4. 2026-09-19 11:54 UTCGHSA enrichment
  5. 2026-09-19 07:59 UTCGHSA enrichment
  6. 2026-09-19 04:04 UTCGHSA enrichment
  7. 2026-09-19 00:09 UTCGHSA enrichment
  8. 2026-09-18 20:13 UTCEG score recompute
  9. 2026-09-18 20:13 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 16:13 UTCGHSA enrichment
  12. 2026-09-18 11:40 UTCGHSA enrichment
  13. 2026-09-18 07:45 UTCGHSA enrichment
  14. 2026-09-18 03:49 UTCGHSA enrichment
  15. 2026-09-17 23:54 UTCGHSA enrichment
  16. 2026-09-17 19:46 UTCEG score recompute
  17. 2026-09-17 19:46 UTCGHSA enrichment
  18. 2026-09-17 19:32 UTCEPSS rescore
  19. 2026-09-17 14:43 UTCGHSA enrichment
  20. 2026-09-17 10:47 UTCGHSA enrichment
  21. 2026-09-17 06:52 UTCGHSA enrichment
  22. 2026-09-17 02:56 UTCGHSA enrichment
  23. 2026-09-16 23:01 UTCGHSA enrichment
  24. 2026-09-16 19:05 UTCGHSA enrichment
  25. 2026-09-16 15:10 UTCEG score recompute
Show 56 more
  1. 2026-09-16 15:10 UTCGHSA enrichment
  2. 2026-09-16 14:09 UTCEPSS rescore
  3. 2026-09-16 11:14 UTCGHSA enrichment
  4. 2026-09-16 07:19 UTCEG score recompute
  5. 2026-09-16 07:19 UTCGHSA enrichment
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-16 03:23 UTCGHSA enrichment
  8. 2026-09-15 23:26 UTCGHSA enrichment
  9. 2026-09-15 19:31 UTCGHSA enrichment
  10. 2026-09-15 15:35 UTCGHSA enrichment
  11. 2026-09-15 11:40 UTCGHSA enrichment
  12. 2026-09-15 07:45 UTCGHSA enrichment
  13. 2026-09-15 03:50 UTCEG score recompute
  14. 2026-09-15 03:50 UTCGHSA enrichment
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-14 23:54 UTCGHSA enrichment
  17. 2026-09-14 19:59 UTCGHSA enrichment
  18. 2026-09-14 16:03 UTCGHSA enrichment
  19. 2026-09-14 12:08 UTCGHSA enrichment
  20. 2026-09-14 08:12 UTCGHSA enrichment
  21. 2026-09-14 04:17 UTCGHSA enrichment
  22. 2026-09-14 00:22 UTCGHSA enrichment
  23. 2026-09-13 20:27 UTCEG score recompute
  24. 2026-09-13 20:27 UTCGHSA enrichment
  25. 2026-09-13 16:48 UTCEPSS rescore
  26. 2026-09-13 16:32 UTCGHSA enrichment
  27. 2026-09-13 12:37 UTCGHSA enrichment
  28. 2026-09-13 08:41 UTCGHSA enrichment
  29. 2026-09-13 04:46 UTCGHSA enrichment
  30. 2026-09-13 00:50 UTCGHSA enrichment
  31. 2026-09-12 20:55 UTCGHSA enrichment
  32. 2026-09-12 16:59 UTCEG score recompute
  33. 2026-09-12 16:59 UTCGHSA enrichment
  34. 2026-09-12 15:02 UTCEPSS rescore
  35. 2026-09-12 13:04 UTCGHSA enrichment
  36. 2026-09-12 09:09 UTCGHSA enrichment
  37. 2026-09-12 05:13 UTCGHSA enrichment
  38. 2026-09-12 01:18 UTCGHSA enrichment
  39. 2026-09-11 21:23 UTCEG score recompute
  40. 2026-09-11 21:23 UTCGHSA enrichment
  41. 2026-09-11 20:47 UTCEG score recompute
  42. 2026-09-11 20:47 UTCGHSA enrichment
  43. 2026-09-11 19:37 UTCGHSA enrichment
  44. 2026-09-11 15:42 UTCEG score recompute
  45. 2026-09-11 15:42 UTCGHSA enrichment
  46. 2026-09-11 14:53 UTCEPSS rescore
  47. 2026-09-11 14:53 UTCEPSS rescore
  48. 2026-09-11 11:43 UTCGHSA enrichment
  49. 2026-09-11 07:48 UTCGHSA enrichment
  50. 2026-09-11 03:53 UTCGHSA enrichment
  51. 2026-09-10 23:58 UTCGHSA enrichment
  52. 2026-09-10 20:02 UTCEG score recompute
  53. 2026-09-10 20:02 UTCGHSA enrichment
  54. 2026-09-10 18:22 UTCEG score recompute
  55. 2026-09-10 17:45 UTCEG score recompute
  56. 2026-09-10 17:44 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-89042?
CVE-2026-89042 is a critical vulnerability published on September 10, 2026. passport-saml-encrypted through 0.1.13 makes SAML signature verification conditional on an optional cert option, allowing attackers to bypass authentication by submitting unsigned SAML responses. Attackers can post forged SAML responses with arbitrary NameID and attributes to the assertion consumer…
When was CVE-2026-89042 disclosed?
CVE-2026-89042 was first published in the National Vulnerability Database on September 10, 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-2026-89042 actively exploited?
CVE-2026-89042 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 80.4% of all scored CVEs.
What is the CVSS score of CVE-2026-89042?
CVE-2026-89042 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-89042?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-89042, 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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