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CVE-2026-19363

lmammino oidc-authorizer Lambda Authorizer handler.rs log file

6.9 Medium

A vulnerability was found in lmammino oidc-authorizer up to 0.4.0. Impacted is an unknown function of the file src/handler.rs of the component Lambda Authorizer. The manipulation results in sensitive information in log files. The attack can be executed remotely. src/handler.rs logs raw Authorization header values and complete bearer tokens/JWTs on authentication failure paths, potentially exposing credentials through CloudWatch Logs. src/models.rs serializes the complete validated JWT claims set with serde_json::to_string(token_claims).unwrap() and propagates it through context["jwtClaims"] to downstream integrations. This code performs serialization, not deserialization, and does not process attacker-controlled jwtClaims input. 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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
None

Exploit likelihood

0.67%Up 0.3 points since Aug 10, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.9

lmammino oidc-authorizer Lambda Authorizer handler.rs log file

A vulnerability was found in lmammino oidc-authorizer up to 0.4.0. Impacted is an unknown function of the file src/handler.rs of the component Lambda Authorizer. The manipulation results in sensitive information in log files. The attack can be executed remotely. src/handler.rs logs raw Authorization header values and complete bearer tokens/JWTs on authentication failure paths, potentially exposing credentials through CloudWatch Logs. src/models.rs serializes the complete validated JWT claims set with serde_json::to_string(token_claims).unwrap() and propagates it through context["jwtClaims"] to downstream integrations. This code performs serialization, not deserialization, and does not process attacker-controlled jwtClaims input. 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.

Record
CVE-2026-19363
CVSS 4.0
6.9 MediumCVSS: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
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
CVSS 2.0
5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:UR
Weakness
CWE-532, CWE-200
Updated
2026-11-02
EUVDEUVD-2026-54934 6.9

A vulnerability was found in lmammino oidc-authorizer up to 0.4.0. Impacted is an unknown function of the file src/handler.rs of the component Lambda Authorizer. The manipulation results in sensitive information in log files. The attack can be executed remotely. src/handler.rs logs raw Authorization header values and complete bearer tokens/JWTs on authentication failure paths, potentially exposing credentials through CloudWatch Logs. src/models.rs serializes the complete validated JWT claims set with serde_json::to_string(token_claims).unwrap() and propagates it through context["jwtClaims"] to downstream integrations. This code performs serialization, not deserialization, and does not process attacker-controlled jwtClaims input. 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.

Record
EUVD-2026-54934
CVSS 4.0
6.9 MediumCVSS: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
Updated
2026-11-02
GitHub AdvisoriesGHSA-fwrx-97hw-xg2r 5.5

A vulnerability was found in lmammino oidc-authorizer up to 0.4.0. Impacted is the function...

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.

Record
GHSA-fwrx-97hw-xg2r
CVSS 4.0
5.5 MediumCVSS: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
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-20, CWE-200
Updated
2026-11-02
NVD 5.5

A vulnerability was found in lmammino oidc-authorizer up to 0.4.0. Impacted is an unknown function of the file src/handler.rs of the component Lambda Authorizer. The manipulation results in sensitive information in log files. The attack can be executed remotely. src/handler.rs logs raw Authorization header values and complete bearer tokens/JWTs on authentication failure paths, potentially exposing credentials through CloudWatch Logs. src/models.rs serializes the complete validated JWT claims set with serde_json::to_string(token_claims).unwrap() and propagates it through context["jwtClaims"] to downstream integrations. This code performs serialization, not deserialization, and does not process attacker-controlled jwtClaims input. 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.

Record
CVE-2026-19363
CVSS 4.0
5.5 MediumCVSS: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
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness
CWE-200, CWE-532
Updated
2026-11-02

Affected products

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-19363 is a medium vulnerability (CVSS 6.9) in Lmammino Oidc-authorizer, published August 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.67%, the 52nd percentile. No source names a fixed version.

References

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