Widely used GitLab CE/EE; account takeover of LDAP-backed accounts can expose repos, CI, and org secrets — significant impact for many enterprises.
CVE-2026-15723
Authenticated user can takeover LDAP-backed GitLab accounts when SAML+LDAP auto-link enabled
Is CVE-2026-15723 being exploited?
Not confirmed. CVE-2026-15723 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.42% probability of exploitation in the next 30 days.
How severe is CVE-2026-15723?
CVE-2026-15723 is rated High with a CVSS score of 8.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-15723?
Yes. A fix has been recorded for CVE-2026-15723. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-15723 affect?
CVE-2026-15723 affects GitLab CE/EE versions from 10.1 before 19.3.6, GitLab 19.4 before 19.4.3, GitLab 19.5 before 19.5.1. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-15723?
Upgrade to fixed versions (>=19.3.6,19.4.3,19.5.1) or disable SAML/LDAP auto-linking
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated attacker can hijack LDAP-backed GitLab accounts via OmniAuth SAML+LDAP auto-link, gaining repository, CI and potential admin access.
Immediate action required
- affected>= 10.1 and < 19.3.6
- affected>= 19.4 and < 19.4.3
- affected>= 19.5 and < 19.5.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.