PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-45062 php CVE debrief

CVE-2026-45062 is a high-severity vulnerability in FrankenPHP, a modern application server for PHP. The vulnerability allows an attacker to mislead FrankenPHP into treating a non-.php file as a .php script, potentially leading to remote code execution. The issue was patched in version 1.12.3.

Vendor
php
Product
frankenphp
CVSS
HIGH 8.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-11
Advisory published
2026-06-10
Advisory updated
2026-06-11

Who should care

Users of FrankenPHP, especially those who allow user-uploaded content or have file storage features, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The splitPos() function in cgi.go misuses golang.org/x/text/search with search.IgnoreCase when the request path contains a non-ASCII byte. This can be exploited by an attacker to craft a URL that tricks FrankenPHP into executing a non-.php file as a .php script.

Defensive priority

High

Recommended defensive actions

  • Upgrade to FrankenPHP version 1.12.3 or later.
  • Restrict file uploads and ensure that only authorized users can modify files served by FrankenPHP.
  • Monitor FrankenPHP logs for suspicious activity.

Evidence notes

The CVE-2026-45062 vulnerability was patched in FrankenPHP version 1.12.3. Users can find more information on the official FrankenPHP GitHub page [ref-5](https://github.com/php/frankenphp/security/advisories/GHSA-3g8v-8r37-cgjm).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45062 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45062

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-45062 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45062

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.