CVE-2026-128019
FrankenPHP before 1.13.4 Information Disclosure via Per-Request Environment Variable Leak
FrankenPHP before 1.13.4 contains an information disclosure vulnerability in worker mode that leaks per-request environment variables into later requests on the same PHP thread. Attackers can read values set via env directives with request placeholders or WithRequestEnv() through getenv() or $_SERVER, causing applications to act on another user's routing, tenant, or authorization values.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| frankenphp php github.com/dunglas/frankenphp
golang |
≥ 0; < 1.13.4 (affected, semver) 1.13.4 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 6.3 medium |
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 4.8 medium |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N | CNA: VulnCheck |
| 4.0 / 6.3 medium |
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 4.8 medium |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/php/frankenphp/security/advisories/GHSA-8386-64gm-3m8qCNA: VulnCheck · vendor-advisory
- https://github.com/php/frankenphp/commit/72f9366de07093ba3f524af3e6c73451012e5199CNA: VulnCheck · patch
- https://www.vulncheck.com/advisories/frankenphp-before-1.13.4-information-disclosure-via-per-request-environment-variable-leakCNA: VulnCheck · third-party-advisory
- https://github.com/php/frankenphp/commit/72f9366de07093ba3f524af3e6c73451012e5199[email protected]
- https://github.com/php/frankenphp/security/advisories/GHSA-8386-64gm-3m8q[email protected]
- https://www.vulncheck.com/advisories/frankenphp-before-1.13.4-information-disclosure-via-per-request-environment-variable-leak[email protected]
For agents and automation
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