What is CVE-2026-42552?

CVE-2026-42552 is a high-severity vulnerability in Flightphp Core, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 7.5/10. Published 2026-05-13.

How severe is CVE-2026-42552?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in Flightphp Core

CVE-2026-42552

Flight is an extensible micro-framework for PHP. Prior to 3.18.1, the default error handler Engine::_error() writes the full exception message, exception code, and stack trace (including absolute filesystem paths) directly into the HTTP 50…

EPSS: 0.000 (3.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Flightphp Core — versions < 3.18.1

Weakness classification (CWE)

CWE-209 — Generation of Error Message Containing Sensitive Information

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-42552?: CVE-2026-42552 is a high-severity vulnerability in Flightphp Core, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 7.5/10. Published 2026-05-13.
How severe is CVE-2026-42552?: High severity. CVSS v3 base score is 7.5 out of 10.