CVE-2026-53976Network attack vectorHinoki check available

Unauthenticated file read via workspace-boundary bypass

Published Aug 6, 2026 · Updated Aug 6, 2026

Path traversal in OpenChamber 1.11.7 and earlier allows remote attackers to read arbitrary host files through unauthenticated API requests. resolveReadPathFromContext accepts allowOutsideWorkspace=true and an attacker-controlled absolute path, making isPathWithinRoot vacuously true instead of enforcing the workspace root. No authentication or user interaction is required; exposure is limited to files readable by the server process, but disclosed signing secrets can enable forged sessions.

CVSS severity9.3
Critical
EPSS probability1.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path traversal in OpenChamber 1.11.7 and earlier allows remote attackers to read arbitrary host files through unauthenticated API requests. resolveReadPathFromContext accepts allowOutsideWorkspace=true and an attacker-controlled absolute path, making isPathWithinRoot vacuously true instead of enforcing the workspace root. No authentication or user interaction is required; exposure is limited to files readable by the server process, but disclosed signing secrets can enable forged sessions.

The record

CVE
CVE-2026-53976
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
Bohdan Triapitsyn
Product
OpenChamber
Classifications
CWE-22, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=0 <=1.11.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Bohdan Triapitsyn · OpenChamberversion=0 <=1.11.7

Published CVSS scores

9.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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