CVE-2026-45062
FrankenPHP RCE in 1.11.2–1.12.2 via crafted non-ASCII URL paths
Is CVE-2026-45062 being exploited?
Not confirmed. CVE-2026-45062 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 0.57% probability of exploitation in the next 30 days.
How severe is CVE-2026-45062?
CVE-2026-45062 is rated High with a CVSS score of 8.1. 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-2026-45062?
Yes. A fix has been recorded for CVE-2026-45062. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-45062 affect?
CVE-2026-45062 affects FrankenPHP 1.11.2 - 1.12.2. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-45062?
Upgrade to 1.12.3+; audit file uploads and path handling.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
RCE via crafted URL path with non-ASCII bytes; attacker can execute arbitrary PHP on the server
Patch when possible
- affected>= 1.11.2 and < 1.12.3
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.