Authentication bypass risk in widely used Apache Shiro LDAP realm; affects many Java apps.
CVE-2026-49268
LDAP DN injection may bypass authentication in Apache Shiro.
Is CVE-2026-49268 being exploited?
Not confirmed. CVE-2026-49268 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 0.49% probability of exploitation in the next 30 days.
How severe is CVE-2026-49268?
CVE-2026-49268 is rated High with a CVSS score of 8.8. 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-2026-49268?
Yes. A fix has been recorded for CVE-2026-49268. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-49268 affect?
CVE-2026-49268 affects Apache Shiro. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-49268?
Upgrade to Shiro 2.2.1+ or 3.0.0-alpha-2+ immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authentication bypass/impersonation by injecting unescaped LDAP DN chars during bind.
Patch when possible
- affected<= 2.2.0
- affected>= 3.0.0-alpha-0 and <= 3.0.0-alpha-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.