Vulnerability · Published Aug 16, 2026 · Assigned by VulnCheck

CVE-2026-73059stoatchat before 0.15.0 Permission Bypass via message_fetch

Medium 6.5

In plain English

A medium-severity incorrect authorization in stoatchat from stoatchat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 68.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
stoatchat	stoatchat	0 – before 0.15.0

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-8qp4-h9xf-2vqr) vendor-advisory
VulnCheck Advisory: stoatchat before 0.15.0 Permission Bypass via message_fetch third-party-advisory