CVE-2026-73059CWE-863broken-access-control

CVE-2026-73059

Medium · published August 16, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
30.3
In the wild
Unconfirmed
What it is

stoatchat before 0.15.0 contains a permission bypass vulnerability in the message_fetch route that checks only ViewChannel permission instead of requiring ReadMessageHistory. Attackers with ViewChannel access but ReadMessageHistory denied can retrieve individual message content by ID, bypassing the intended history restriction enforced by bulk read routes.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00375 · 30.3th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-08-16T18:16Z
References (2)
https://github.com/stoatchat/stoatchat/security/advisories/GHSA-8qp4-h9xf-2vqr · [email protected]https://www.vulncheck.com/advisories/stoatchat-before-permission-bypass-via-message-fetch · [email protected]
EPSS history
Timeline
  • 16 AUG 13:14Z
    stoatchat before 0.15.0 Permission Bypass via message_fetch
    cvelistv5