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Back to active CVEs
Critical · CVSS 9.2CVE-2026-62263GHSA-GF8H-GQ53-288J

OpenAM: WebAuthn Java deserialization RCE via ObjectInputFilter depth>1 bypassCVE-2026-62263

Answer in brief

CVE-2026-62263 records a Critical severity (CVSS 9.2) vulnerability in OpenAM: WebAuthn Java deserialization RCE via ObjectInputFilter depth>1 bypass. The current sources do not mark it as known exploited. The current feed maps OpenIdentityPlatform/OpenAM (generic), org.openidentityplatform.openam:openam-auth-webauthn (maven). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 15, 2026Updated Sep 23, 2026Source checked Oct 30, 2026First seen by HOL Aug 8, 2026Material review Sep 23, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.2
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 9.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps OpenIdentityPlatform/OpenAM (generic), org.openidentityplatform.openam:openam-auth-webauthn (maven). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
OpenIdentityPlatform/OpenAMgeneric<16.1.216.1.2
org.openidentityplatform.openam:openam-auth-webauthnmaven>=0 <16.1.216.1.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for OpenIdentityPlatform/OpenAM, org.openidentityplatform.openam:openam-auth-webauthn.
  2. 2Review the reported fix. Update OpenIdentityPlatform/OpenAM to 16.1.2; org.openidentityplatform.openam:openam-auth-webauthn to 16.1.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 23, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 8, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Deserialization
EPSS
Not reported
CWE IDs
CWE-502
Source
CVE List V5
Source checked
Oct 30, 2026
References
4 linked sources
Open source record