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CVE

CVE-2026-45051

OpenAM Pre-auth RCE via Java Deserialization in WebAuthn Authenticator Storage
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CVE

CVE-2026-45051

OpenAM Pre-auth RCE via Java Deserialization in WebAuthn Authenticator Storage

Open Access Management (OpenAM) is an access management solution. Prior to 16.1.1, WebAuthnAuthentication loads a serialized AuthenticatorImpl object graph from the configured userAttribute through loadAuthenticators without an ObjectInputFilter. Exploitation requires the WebAuthn flow to be reachable and an attacker to have previously written controlled data to that attribute through delegated administration, provisioning, directory access, legacy REST self-registration, or unsafe configuration. When those non-default conditions hold, the data is deserialized before assertion verification and can execute a classpath gadget in the application server process. This issue is fixed in version 16.1.1.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.2
-
4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.1, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45051.json, https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-6c99-87fr-6q7r, https://nvd.nist.gov/vuln/detail/CVE-2026-45051, https://github.com/OpenIdentityPlatform/OpenAM/commit/8b02328d36bc9cd40602128a6d399d1eda9e6753

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.00688%
EPSS Percentile
0.52883%
Introduced Version
0
Fix Available
8b02328d36bc9cd40602128a6d399d1eda9e6753

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