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CVE-2026-89043— passport-saml-encrypted through 0.1.13 XML Signature Wrapping via Assertion Prepending

Quick assessment

Affected
krakenjs passport-saml-encrypted
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

passport-saml-encrypted 在 0.1.13 及更早版本中存在一个 XML 签名包装（signature wrapping）漏洞。该漏洞的成因是：签名验证和断言（assertion）提取分别使用独立的 XPath 查询，且两者之间没有进行交叉验证。因此，攻击者若持有任意一个有效签名的 SAML 消息，可以在消息中前置插入一个伪造的、未签名的断言；该伪造断言会被系统接受为已验证的身份，而真正的签名则针对原始断言进行验证，导致身份被错误地绑定到攻击者控制的断言上。

CVSS 7.4 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-89043

Vulnerability Information
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Vulnerability Title
passport-saml-encrypted through 0.1.13 XML Signature Wrapping via Assertion Prepending
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
krakenjs passport-saml-encrypted 0 ~ 0.1.13 -

II. Public POCs for CVE-2026-89043

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III. Intelligence Information for CVE-2026-89043

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Patches & Fixes for CVE-2026-89043 (1)

Vendor Advisories for CVE-2026-89043 (1)

Proof of Concept for CVE-2026-89043 (1)

Other References for CVE-2026-89043 (2)

IV. Related Vulnerabilities

Same product: passport-saml-encrypted
Same vendor: krakenjs
Same weakness: CWE-347

V. Comments for CVE-2026-89043

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