CVE-2026-89043

HIGHPre-NVD 7.47.4—
EchelonGraph scoreHIGH confidence

Score 7.4 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-10. a secondary CVSS source baseline 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.4Exploit: Elevated riskExposed: 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 contains an XML signature wrapping vulnerability where signature verification and assertion extraction use independent XPath lookups with no cross-validation. Attackers holding any validly signed SAML message can prepend a forged unsigned assertion that gets accepted as the verified identity while the genuine signature validates against the original assertion.

CVSS v3
7.4
EG Score
7.4(high)
EG Risk
49(Track*)
EG Risk 49/100SSVC: 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
Severity74% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

September 10, 2026

Last Modified

September 10, 2026

Advisory Details (5)

Auto-updated Sep 10, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

passport-saml-encrypted through 0.1.13 XML Signature Wrapping via Assertion Prepending | Advisories | VulnCheck

https://www.vulncheck.com/advisories/passport-saml-encrypted-through-0.1.13-xml-signature-wrapping-via-assertion-prepending
generic

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

https://github.com/krakenjs/passport-saml-encrypted
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#L328
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#L256
generic🟡 PoC Available

passport-saml-encrypted xml signature wrapping · Issue #30 · krakenjs/passport-saml-encrypted · GitHub

https://github.com/krakenjs/passport-saml-encrypted/issues/30

Vendor Advisories for CVE-2026-89043(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 27× in last 7d / 42× 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 19:15 UTCEG score recompute
  2. 2026-09-19 19:15 UTCGHSA enrichment
  3. 2026-09-19 07:21 UTCGHSA enrichment
  4. 2026-09-18 19:31 UTCEG score recompute
  5. 2026-09-18 19:31 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 07:37 UTCGHSA enrichment
  8. 2026-09-17 19:46 UTCEG score recompute
  9. 2026-09-17 19:46 UTCGHSA enrichment
  10. 2026-09-17 19:32 UTCEPSS rescore
  11. 2026-09-17 06:43 UTCGHSA enrichment
  12. 2026-09-16 18:35 UTCEG score recompute
  13. 2026-09-16 18:35 UTCGHSA enrichment
  14. 2026-09-16 14:09 UTCEPSS rescore
  15. 2026-09-16 06:43 UTCEG score recompute
  16. 2026-09-16 06:43 UTCGHSA enrichment
  17. 2026-09-16 05:15 UTCEPSS rescore
  18. 2026-09-15 18:53 UTCGHSA enrichment
  19. 2026-09-15 07:02 UTCEG score recompute
  20. 2026-09-15 07:02 UTCGHSA enrichment
  21. 2026-09-15 03:12 UTCEPSS rescore
  22. 2026-09-14 19:11 UTCGHSA enrichment
  23. 2026-09-14 07:21 UTCGHSA enrichment
  24. 2026-09-13 19:30 UTCEG score recompute
  25. 2026-09-13 19:30 UTCGHSA enrichment
Show 17 more
  1. 2026-09-13 16:48 UTCEPSS rescore
  2. 2026-09-13 07:39 UTCGHSA enrichment
  3. 2026-09-12 19:49 UTCEG score recompute
  4. 2026-09-12 19:49 UTCGHSA enrichment
  5. 2026-09-12 15:02 UTCEPSS rescore
  6. 2026-09-12 07:58 UTCGHSA enrichment
  7. 2026-09-11 20:08 UTCEG score recompute
  8. 2026-09-11 20:08 UTCGHSA enrichment
  9. 2026-09-11 14:53 UTCEPSS rescore
  10. 2026-09-11 14:53 UTCEPSS rescore
  11. 2026-09-11 07:53 UTCGHSA enrichment
  12. 2026-09-10 20:02 UTCEG score recompute
  13. 2026-09-10 20:02 UTCGHSA enrichment
  14. 2026-09-10 18:22 UTCEG score recompute
  15. 2026-09-10 18:00 UTCEG score recompute
  16. 2026-09-10 17:45 UTCEG score recompute
  17. 2026-09-10 17:44 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-89043?
CVE-2026-89043 is a high vulnerability published on September 10, 2026. passport-saml-encrypted through 0.1.13 contains an XML signature wrapping vulnerability where signature verification and assertion extraction use independent XPath lookups with no cross-validation. Attackers holding any validly signed SAML message can prepend a forged unsigned assertion that gets…
When was CVE-2026-89043 disclosed?
CVE-2026-89043 was first published in the National Vulnerability Database on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-89043 actively exploited?
CVE-2026-89043 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 78.8% of all scored CVEs.
What is the CVSS score of CVE-2026-89043?
CVE-2026-89043 has a CVSS v3 base score of 7.4 (NVD).
How do I remediate CVE-2026-89043?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-89043, 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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