CVE-2026-44203 is a critical-severity cross-site scripting (XSS) vulnerability in org.openidentityplatform.openam:openam-oauth2 (maven), affecting versions >= 13.0.0, < 16.1.1. It is fixed in 16.1.1.
Summary The OAuth 2.0 / OpenID Connect authorization endpoint does not sufficiently sanitize certain user-supplied parameters before incorporating them into the HTML response generated for the form_post response mode. This may allow an attacker to inject content into the rendered page in the context of the OpenAM origin.
Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.
CVE-2026-44203 has a CVSS score of 9.3 (Critical). The vector is network-reachable, no privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (16.1.1). Upgrading removes the vulnerable code path.
maven
org.openidentityplatform.openam:openam-oauth2 (>= 13.0.0, < 16.1.1)org.openidentityplatform.openam:openam-oauth2 → 16.1.1 (maven)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
Kodem's runtime-powered SCA identifies whether CVE-2026-44203 is reachable in your applications. Explore open-source security for your team.
See if CVE-2026-44203 is reachable in your applications. Get a demo
Already deployed Kodem? See CVE-2026-44203 in your environment →Upgrade org.openidentityplatform.openam:openam-oauth2 to 16.1.1 or later to resolve this vulnerability.
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2026-44203 is a critical-severity cross-site scripting (XSS) vulnerability in org.openidentityplatform.openam:openam-oauth2 (maven), affecting versions >= 13.0.0, < 16.1.1. It is fixed in 16.1.1. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
CVE-2026-44203 has a CVSS score of 9.3 (Critical). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
org.openidentityplatform.openam:openam-oauth2 (maven) versions >= 13.0.0, < 16.1.1 is affected.
Yes. CVE-2026-44203 is fixed in 16.1.1. Upgrade to this version or later.
Whether CVE-2026-44203 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
Upgrade org.openidentityplatform.openam:openam-oauth2 to 16.1.1 or later.