Vulnerability · Published May 13, 2026 · Assigned by GitHub_M

CVE-2026-42552Flight: Sensitive information disclosure via default error handler in flightphp/core

High 7.5

In plain English

A high-severity security flaw in core from flightphp. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.3%top 73.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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 500 response, with no debug gating. Production deployments leak internal paths, any secret interpolated into an exception message, and full module structure — giving attackers primitives for chaining other weaknesses (LFI, path traversal). This vulnerability is fixed in 3.18.1.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	flightphp/core	3.18.1	GHSA-qrch-52m5-vv85

Affected products (as reported)

Vendor	Product	Versions
flightphp	core	< 3.18.1

Weakness: CWE-209 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/flightphp/core/security/advisories/GHSA-qrch-52m5-vv85 x_refsource_CONFIRM