TI-2026-44471 Aliases CVE-2026-62263 GHSA-gf8h-gq53-288j

OpenAM: WebAuthn Java deserialization RCE via ObjectInputFilter depth>1 bypass

MEDIUM 43CWE-502Published 2026-09-15 · Updated 2026-09-15

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-502.

Summary

Open Access Management (OpenAM) is an access management solution. Prior to 16.1.2, WebAuthnAuthentication.deserialize applies an ObjectInputFilter that allows every serialized object at depth greater than 1 and therefore constrains only an AuthenticatorImpl root object. A pre-authentication attacker can supply a userHandle whose serialized graph has a valid AuthenticatorImpl root and a nested gadget class, causing readObject or readResolve execution before the cast and assertion verification when a usable gadget is on the classpath. This bypasses the incomplete remediation for the earlier WebAuthn deserialization vulnerability. This issue is fixed in version 16.1.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0086 58th percentileScored 2026-11-07

Fix Fixed OpenAM (OpenIdentityPlatform): 16.1.2org.openidentityplatform.openam:openam-auth-webauthn (Maven): 16.1.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
OpenIdentityPlatform	OpenAM	before 16.1.2	16.1.2	Patch available	CNA
—	org.openidentityplatform.openam:openam-auth-webauthn (Maven)	before 16.1.2	16.1.2	Patch available	GHSA-gf8h-gq53-288j

OpenAM VendorOpenIdentityPlatform Affected before 16.1.2 Fixed in 16.1.2 Patch available CNA
org.openidentityplatform.openam:openam-auth-webauthn (Maven) Vendor— Affected before 16.1.2 Fixed in 16.1.2 Patch available GHSA-gf8h-gq53-288j

Remediation

Fix · CNA OpenAM (OpenIdentityPlatform) Fixed in 16.1.2
Fix · GHSA-gf8h-gq53-288j org.openidentityplatform.openam:openam-auth-webauthn (Maven) Fixed in 16.1.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-62263
2026-10-03 Alias added: GHSA-gf8h-gq53-288j

References

Other 4

TI-2025-20332 OpenDJ Denial of Service (Dos) using alias loop CVSS 4.0HIGH 8.7
TI-2026-25836 Pre-Authentication Remote Code Execution via `jato.clientSession` Deserialization in OpenAM CVSS 4.0CRITICAL 9.3
TI-2026-86693 Session token disclosure in OpenAM notification WebSocket CVSS 4.0CRITICAL 10.0
TI-2026-86692 Authentication bypass in OpenAM SAML login accepts unsigned assertions CVSS 4.0CRITICAL 9.3
TI-2026-86691 Privilege escalation in OpenAM via self-registration attribute bypass CVSS 4.0CRITICAL 9.3
TI-2026-86685 Unbounded Java deserialization in OpenAM enables denial of service CVSS 4.0HIGH 8.7

See all 54 →

Sources

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