CVE-2026-89043 passport-saml-encrypted - Authentication Bypass

passport-saml-encrypted <= 0.1.13 contains an XML signature wrapping vulnerability caused by independent XPath lookups without cross-validation in signature verification and assertion extraction, letting attackers with any valid signed SAML message bypass authentication, exploit requires attacker to hold a valid signed SAML message.

CVSS base score 7.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.31% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
10 September 2026
Updated
15 October 2026
Weakness
CWE-347

Vendor fix

Update to the latest version beyond 0.1.13.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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