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CVE-2026-128026 FrankenPHP 1.5.0 before 1.13.0 Cross-Request Environment Leakage via putenv

6.9 mediumEPSS 0.1%

Medium (6.9) in php frankenphp. EPSS 0.1% estimated probability of exploitation activity in the next 30 days.

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FrankenPHP from 1.5.0 before 1.13.0 contains an incomplete environment sandbox vulnerability in which putenv writes to the process-wide OS environment via os.Setenv, leaking values across concurrent requests. Attackers reaching a request path that spawns child processes with the default environment through proc_open or exec can read secrets such as database passwords set by other requests.

Severity

CVSS 4.0

6.9 medium
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

CVSS 3.1

6.4 medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
EPSS
0.1% estimated probability of exploitation activity in the next 30 days; 3rd percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CWE
CWE-488 Exposure of Data Element to Wrong Session
Published
Modified
Assigned by
VulnCheck (CNA)
NVD analysis
Deferred: the NVD does not plan to analyze it
Record from
the NVD, synced

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Affected

Versions

From the CNA's record in the CVE List.

ProductAffected
php frankenphpfrom 1.5.0 before 1.13.0

Attack patterns (CAPEC)

  • CAPEC-59 Session Credential Falsification through Prediction Likelihood: High · Severity: High
  • CAPEC-60 Reusing Session IDs (aka Session Replay) Likelihood: High · Severity: High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

History

  1. The NVD deferred its analysis

Changes since this site first stored the record. The same for every record: /api/public/changes.

References

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