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undici EUVDEUVD-2026-71474

| CVE-2026-85152 HIGH
Origin Validation Error (CWE-346)
2026-09-04 openjs
Authentication Bypass Information Disclosure Red Hat Undici Suse
7.4
CVSS 3.1 · Vendor: openjs
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Severity by source

Vendor (openjs) PRIMARY
7.4 HIGH
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
vuln.today AI
7.4 HIGH

Network-accessible with no auth required; AC:H reflects mandatory Client/Pool interceptor-composition prerequisite; C:H and I:H match demonstrated cross-origin disclosure and auth bypass; A:N as no availability impact described.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
SUSE
HIGH
qualitative
Red Hat
7.4 HIGH
qualitative

Primary rating from Vendor (openjs).

CVSS VectorVendor: openjs

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

4
POC Analysis Generated
Sep 07, 2026 - 15:35 vuln.today
Patch available
Sep 04, 2026 - 18:03 EUVD
Analysis Generated
Sep 04, 2026 - 17:09 vuln.today
CVE Published
Sep 04, 2026 - 16:36 cve.org
HIGH 7.4

DescriptionCVE.org

undici 8.10.0 omits the destination origin from the cache and request-deduplication keys when the cache or deduplicate interceptor is composed directly onto a Client or Pool. Because the internal cache key falls back to an empty origin string, a cacheable or in-flight response from one upstream origin is returned for a request to a different, trusted origin whenever the method, path, and relevant headers match, which permits cross-origin information disclosure and persistent cache poisoning. The reporter demonstrated a full authentication bypass in which a JWT signed with an attacker-controlled key was accepted as belonging to a trusted issuer, and the trusted origin was never contacted. This is a regression introduced in 8.10.0 and affects undici versions from 8.10.0 up to 8.10.2. Applications using an Agent, which carries the origin in its dispatch options, are not affected. Users should upgrade to undici 8.10.2.

AnalysisAI

Cross-origin cache key confusion in undici 8.10.0 and 8.10.1 allows unauthenticated network attackers to receive responses intended for a different upstream origin and to persistently poison the cache with attacker-controlled content. When the cache or request-deduplication interceptor is composed directly onto a Client or Pool instance, the origin is silently dropped from the key and falls back to an empty string, meaning any two origins sharing the same HTTP method, path, and relevant headers share a single cache slot. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Exploit
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the target application runs undici 8.10.0 or 8.10.1 AND wires either the cache interceptor or the request-deduplication interceptor directly onto a Client or Pool instance (for example, via Client.compose() or Pool.compose() with cacheInterceptor or deduplicateInterceptor). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 7.4 vector (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N) accurately characterizes the balance of factors: exploitation is remote and requires no attacker credentials, but the high attack complexity reflects a genuine prerequisite - the vulnerable interceptor-composition pattern (Client/Pool, not Agent) must be present in the application code. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade undici to version 8.10.2, the vendor-confirmed patched release, which restores the destination origin to the cache and deduplication key even when interceptors are attached directly to a Client or Pool. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, audit all Node.js applications and dependencies to identify undici 8.10.0 or 8.10.1 usage via package managers and lock files. …

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise High Performance Computing 12 Affected
SUSE Linux Enterprise Module for Python 3 15 SP7 Not-Affected
SUSE Linux Enterprise Module for Web and Scripting 15 SP7 Affected
SUSE Linux Enterprise Module for Web and Scripting 15 SP7 Affected

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EUVD-2026-71474 vulnerability details – vuln.today
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