CVE-2026-44203: high-severity vulnerability in OpenIdentityPlatform OpenAM
OpenAM: Pre-auth Reflected XSS in OAuth2 / OIDC response_mode=form_post via state parameter (FormPostResponse.ftl)
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.3epss 0.6%
Open Access Management (OpenAM) is an access management solution. Prior to 16.1.1, the OAuth 2.0 and OpenID Connect authorization endpoint does not sufficiently encode user-supplied parameters before FormPostResponse.ftl and checkSession.ftl render them into HTML for the form_post response mode. An unauthenticated attacker can induce a user to open a crafted authorization request and execute script in the OpenAM origin. This issue is fixed in version 16.1.1.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N
Affected products
OpenIdentityPlatform · OpenAMRelated CVEs — OpenIdentityPlatform OpenAM
In the same product, most dangerous first.
CVE-2026-33439CRITICALPre-Authentication Remote Code Execution via `jato.clientSession` Deserialization in OpenAMEPSS 9.3%CVE-2024-41667HIGHOpenAM FreeMarker template injectionEPSS 3.5%CVE-2023-37471CRITICALUser impersonation using SAMLv1.x SSO in Open Access Management EPSS 1.3%CVE-2026-62379CRITICALOpenAM: Unauthenticated Remote Code Execution via Class.forName in AuthXMLUtils.createCustomCallbackEPSS 1.1%CVE-2026-46619CRITICALOpenAM Authentication Bypass via MSISDN LDAP InjectionEPSS 1.0%CVE-2026-62263CRITICALOpenAM: WebAuthn Java deserialization RCE via ObjectInputFilter depth>1 bypassEPSS 0.9%