CVE-2026-88939CWE-863broken-access-control

CVE-2026-88939

High · published September 10, 2026

CVSS v3.1
8.3
EPSS
0%
Percentile
40.3
In the wild
Unconfirmed
What it is

knowns through 0.33.0 exempts the project.set action from permission guard checks unconditionally, allowing read-only agent sessions to bypass restrictions. Attackers can invoke project.set to repoint the server at another project directory and obtain write access capabilities.

The record
Technical detail
CVSS v3.1
8.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
EPSS
0.00478 · 40.3th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-09-10T20:18Z
References (5)
https://github.com/knowns-dev/knowns/security/advisories/GHSA-h73x-698r-qrvg · [email protected]https://www.vulncheck.com/advisories/knowns-through-0.33.0-authorization-bypass-via-project-set-bootstrap-exemption · [email protected]https://github.com/knowns-dev/knowns/security/advisories/GHSA-h73x-698r-qrvg · 134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/permissions/guard.go#L104-L113 · [email protected]https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/permissions/registry.go#L51-L54 · [email protected]
EPSS history
Timeline
  • 12 SEP 03:22Z
    EPSS moved — → 0%
    epss
  • 10 SEP 15:28Z
    knowns through 0.33.0 Authorization Bypass via project.set Bootstrap Exemption
    cvelistv5