CVE-2026-45075
Symfony HEAD-request authorization bypass allowing protected controllers to run and leak data.
Is CVE-2026-45075 being exploited?
Not confirmed. CVE-2026-45075 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 0.43% probability of exploitation in the next 30 days.
How severe is CVE-2026-45075?
CVE-2026-45075 is rated High with a CVSS score of 8.3. 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-2026-45075?
Yes. A fix has been recorded for CVE-2026-45075. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-45075 affect?
CVE-2026-45075 affects Symfony < 7.4.12, Symfony < 8.0.12, apps using method-scoped #[IsGranted]/#[IsSignatureValid]/#[IsCsrfTokenValid]. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-45075?
Upgrade to Symfony 7.4.12 or 8.0.12+; block or reject HEAD requests as interim mitigation.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attackers can use HEAD requests to bypass method-scoped authorization attributes, execute protected controllers, leak headers, and trigger side effects.
Immediate action required
- affected>= 7.4.0-BETA1 and < 7.4.12
- affected>= 8.0.0-BETA1 and < 8.0.12
- affected>= 7.4.0-BETA1 and < 7.4.12
- affected>= 8.0.0-BETA1 and < 8.0.12
- affected>= 7.4.0-BETA1 and < 7.4.12
- affected>= 8.0.0-BETA1 and < 8.0.12
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.