CVE-2026-55629

Whistle is an HTTP, HTTP2, HTTPS, and WebSocket debugging proxy. Prior to 2.10.3, lib/service/service.js handles GET /cgi-bin/temp/get by reading req.query.filename, joining it to TEMP_FILES_PATH only when it matches the temporary file pattern, and otherwise passing the user-supplied filename directly to getFile, allowing a remote attacker to read arbitrary files such as /etc/passwd. This issue is reported as fixed in version 2.10.3.

CVSS 4.0

8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS

0.6% chance of exploitation in the next 30 days; higher than 45% of CVEs (scores of 2026-10-25)

CWE

CWE-22

Published

2026-07-16

Modified

2026-10-24

Record from

the NVD, synced 2026-10-25

Packages (OSV)

References

• http://github.com/avwo/whistle/releases/tag/v2.10.3
• https://github.com/avwo/whistle/commit/777bcf69bae2972aa7138a158c91619185653cf5
• https://github.com/avwo/whistle/security/advisories/GHSA-3vfr-4gwf-qxfp
• https://github.com/avwo/whistle/security/advisories/GHSA-3vfr-4gwf-qxfp

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