EUVD-2026-54934
GHSA-fwrx-97hw-xg2r
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/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
Network-reachable endpoint with no auth required; impact limited to partial confidentiality per available data, no integrity or availability effect confirmed.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/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
Lifecycle Timeline
2DescriptionCVE.org
A vulnerability was found in lmammino oidc-authorizer up to 0.4.0. Impacted is the function unwrap of the file src/handler.rs of the component Fixed Message Handler. The manipulation of the argument jwtClaims results in deserialization. The attack can be executed remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
AnalysisAI
Unsafe deserialization in lmammino/oidc-authorizer (versions up to 0.4.0) exposes confidential data via manipulated JWT claims submitted to the Fixed Message Handler component. The vulnerable code path runs through the unwrap function in src/handler.rs, which processes the jwtClaims argument without adequate deserialization controls - particularly concerning given this component's role as an OIDC authorization gatekeeper. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The vulnerable code path is triggered by any request that reaches the Fixed Message Handler component and supplies attacker-controlled input via the `jwtClaims` argument. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 5.5 reflects a medium-severity finding with constrained impact: only limited confidentiality (VC:L) is indicated, with no integrity or availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A remote, unauthenticated attacker identifies a public-facing API endpoint protected by oidc-authorizer and sends a crafted HTTP request containing a malformed or adversarially structured `jwtClaims` payload targeting the Fixed Message Handler. The `unwrap()` function in `src/handler.rs` deserializes the payload without adequate validation, causing the handler to expose internal or sensitive claim data to the attacker. … |
| Remediation | No vendor-released patch has been identified at time of analysis - the maintainer did not respond to disclosure. … Detailed patch versions, workarounds, and compensating controls in full report. |
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More in Oidc Authorizer
View allSame weakness CWE-502 – Deserialization of Untrusted Data
View allSame technique Deserialization
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External POC / Exploit Code
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