Shibboleth OIDC OP plugin patched
CERT-FR advises patching the Shibboleth OpenID Connect OpenID Provider plugin before V4.3.3 to fix security policy bypass flaws.
Sourcecert.cyber.gouv.fr — open the original
What to check
- Applies to
- Not tied to a specific actor, malware or CVE, only to the sectors it covers, so it may be general reporting. Check the source before acting on it. Whether it concerns you is not assessed.
CERT-FR published an advisory describing multiple vulnerabilities in the OpenID Connect OpenID Provider (OIDC OP) plugin for Shibboleth, affecting all versions prior to V4.3.3. The vulnerabilities allow an attacker to bypass security policy controls, though the advisory does not specify further technical detail on the exploitation mechanics.
No evidence of active exploitation in the wild is mentioned in the advisory. Defenders running Shibboleth with the OIDC OP plugin should consult the referenced Shibboleth security bulletins (secadv_20261109 and secadv_20261109a, both dated 9 November 2026) and apply the available patches to upgrade to V4.3.3 or later.
Source reporting: https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1491
Free public brief. Slack alerts on the vendors you run come with the paid plans, and a new account gets three days of them, no card.
What this brief leaves out
This page is the free tier: the write-up, the severity, the names. The paid plans add the security research and news reporting the free tier leaves out.
It sits in a corpus of 16,436 reports from 149 sources, 661 of them written in the last seven days, and it grows through the day.
A new account starts with three days of all of it, no card, then keeps the government and CERT reporting free. Slack alerts are a paid-plan feature: name the vendors you run and Slack hears about the reports that touch them, not the rest of the week's. Nothing is charged unless you subscribe.
Create a free account What it costs