CVE-2026-89043

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.31% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 23.5% of scored records. A rank, not a probability.

NVD base score

9.1 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-09-10.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-10 17:39Z1 MO AGO

Last updated

2026-09-10 17:53Z1 MO AGO

Reserved

2026-09-10

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Critical (CVSS 9.1)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Weaknesses

• CWE-347Improper Verification of Cryptographic SignatureBase

Data version

5.2

Document digest

1f11ebfb68a34d9a38f3872cfb10526d02e9ea1045e9c171f79bc97e87ae11dc

• github.comReporter advisory: XML signature wrappinghttps://github.com/krakenjs/passport-saml-encrypted/issues/30issue-tracking
• github.comSignature located by an unconstrained XPath at v0.1.13https://github.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js#L256technical-description
• github.comAssertion selected by a separate first-match XPath at v0.1.13https://github.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js#L328technical-description
• github.comkrakenjs/passport-saml-encryptedhttps://github.com/krakenjs/passport-saml-encryptedproduct
• www.vulncheck.comVulnCheck Advisory: passport-saml-encrypted through 0.1.13 XML Signature Wrapping via Assertion Prependinghttps://www.vulncheck.com/advisories/passport-saml-encrypted-through-0.1.13-xml-signature-wrapping-via-assertion-prependingthird-party-advisory