CVE-2026-62263— OpenAM: WebAuthn Java deserialization RCE via ObjectInputFilter depth>1 bypass
Quick assessment
Affected
OpenIdentityPlatform OpenAM
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
开放访问管理（OpenAM）是一款访问管理解决方案。在 16.1.2 版本之前，WebAuthnAuthentication.deserialize 方法应用了一个 ObjectInputFilter，该过滤器允许深度大于 1 的所有序列化对象，因此仅对根对象 进行了限制。一个可在认证前发起攻击者可以提供一个 ，其序列化对象图拥有一个有效的 根对象和一个嵌套的“小工具类”（gadget class），从而在强类型转换和断言验证之前触发 或 的执行（前提是类路径中存在可用的小工具类）。这绕过之前针对 WebAuthn
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I. Basic Information for CVE-2026-62263
Vulnerability Information
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Vulnerability Title
OpenAM: WebAuthn Java deserialization RCE via ObjectInputFilter depth>1 bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| OpenIdentityPlatform | OpenAM | < 16.1.2 | - |
|
II. Public POCs for CVE-2026-62263
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-62263 (1)
Vendor Advisories for CVE-2026-62263 (1)
Vendor Pages for CVE-2026-62263 (1)
Same Patch Batch · OpenIdentityPlatform · 2026-09-15 · 18 CVEs total
| CVE-2026-62379 | 9.8 CRITICAL | OpenAM: Unauthenticated Remote Code Execution via Class.forName in AuthXMLUtils.createCust |
| CVE-2026-46619 | 9.3 CRITICAL | OpenAM Authentication Bypass via MSISDN LDAP Injection |
| CVE-2026-45052 | 9.3 CRITICAL | OpenAM Pre-auth User Profile Tampering via Anonymous SOAP Authn in Liberty IDPP/Discovery |
| CVE-2026-45051 | 9.2 CRITICAL | OpenAM Pre-auth RCE via Java Deserialization in WebAuthn Authenticator Storage |
| CVE-2026-48717 | 9.1 CRITICAL | OpenAM OAuth Authorization Bypass via PKCE Challenge |
| CVE-2026-45048 | 8.5 HIGH | OpenAM Authenticated Privilege Escalation via Raw Token Disclosure Session RPC |
| CVE-2026-44203 | 8.3 HIGH | OpenAM: Pre-auth Reflected XSS in OAuth2 / OIDC response_mode=form_post via state paramete |
| CVE-2026-45794 | 7.7 HIGH | OpenAM Unsafe Java Deserialization via SNS |
| CVE-2026-47426 | 7.6 HIGH | OpenAM OAuth Client Impersonation via JWKS Resolver Cache |
| CVE-2026-46498 | 7.6 HIGH | OpenAM Arbitrary OAuth Token Minting via Push Registration |
| CVE-2026-47424 | 7.5 HIGH | OpenAM Authenticated RCE via Groovy Sandbox Escape |
| CVE-2026-53660 | 7.4 HIGH | OpenAM Insecure SSO Cookie Initialization |
| CVE-2026-46623 | 7.4 HIGH | OpenAM Account Takeover via Unverified Password Change in OAuth2 Module |
| CVE-2026-41573 | 7.1 HIGH | OpenAM LDAP Injection via `_queryId` Parameter |
| CVE-2026-44793 | 7.0 HIGH | OpenAM: Pre-authentication Reflected XSS in SAML2 Cluster Cookie-Hash-Redirect Path via `F |
| CVE-2026-62280 | 6.1 MEDIUM | OpenAM Reflected XSS in the OAuth2/OIDC `wap` consent page |
| CVE-2026-44202 | 5.3 MEDIUM | OpenAM Authenticated Server-Side Request Forgery (SSRF) via `/sessionservice` |
IV. Related Vulnerabilities
Same product: OpenAM
-
CVE-2026-48717
OpenAM OAuth Authorization Bypass via PKCE Challenge -
CVE-2026-47426
OpenAM OAuth Client Impersonation via JWKS Resolver Cache -
CVE-2026-47424
OpenAM Authenticated RCE via Groovy Sandbox Escape -
CVE-2026-41573
OpenAM LDAP Injection via `_queryId` Parameter -
CVE-2026-62280
OpenAM Reflected XSS in the OAuth2/OIDC `wap` consent page
Same vendor: OpenIdentityPlatform
-
CVE-2026-48717
OpenAM OAuth Authorization Bypass via PKCE Challenge -
CVE-2026-47426
OpenAM OAuth Client Impersonation via JWKS Resolver Cache -
CVE-2026-47424
OpenAM Authenticated RCE via Groovy Sandbox Escape -
CVE-2026-41573
OpenAM LDAP Injection via `_queryId` Parameter -
CVE-2026-62280
OpenAM Reflected XSS in the OAuth2/OIDC `wap` consent page
Same weakness: CWE-502
-
CVE-2026-45051
OpenAM Pre-auth RCE via Java Deserialization in WebAuthn Aut -
CVE-2026-45794
OpenAM Unsafe Java Deserialization via SNS -
CVE-2026-13293
IBM MQ Java messaging is vulnerable to remote code execution -
CVE-2026-67399
WHMCS 9.0.0-9.0.7/8.13.6及之前版本反序列化RCE -
CVE-2026-17156
IBM App Connect Enterprise Toolkit is vulnerable to arbitrar
V. Comments for CVE-2026-62263
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