by Kastro
Paper/Archive/CVE-2026-53976

CVE-2026-53976

Bohdan Triapitsyn OpenChamber — OpenChamber 1.11.7 Path Traversal File Read via allowOutsideWorkspace Parameter

EPSS 3%CVSS 9.3
critical.is priorityof 100
45
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 85.4.854 × 2017.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

OpenChamber 1.11.7 contains a path traversal vulnerability in the file-serving endpoints /api/fs/read, /api/fs/stat, and /api/fs/raw that allows unauthenticated remote attackers to read arbitrary files by supplying the allowOutsideWorkspace=true query parameter alongside an absolute path, bypassing the workspace boundary check in resolveReadPathFromContext. Attackers can exploit the vacuous isPathWithinRoot guard to read sensitive files such as the JWT signing secret, SSH private keys, API credentials, and environment variables, enabling full authentication bypass by forging session cookies on password-protected deployments.

Affected

ProductAffectedFixed inSource
OpenChamber≤ 1.11.7–CNA

Scores by source

VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
VulnCheck (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/openchamber/openchamberpatchgithub.com/openchamber/openchamber/commit/f1b9506132faf6c564a2694c7f33b94421a49b4awriteupvulncheck.com/advisories/openchamber-path-traversal-file-read-via-allowoutsideworkspace-parameter