CVE-2026-111653CWE-306

CVE-2026-111653

Medium · published October 16, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
27.9
In the wild
Unconfirmed
What it is

53AIHub through 0.5.3 contains a missing authentication vulnerability that allows unauthenticated attackers to overwrite any enterprise's profile by sending PUT requests to /api/enterprises/:id. Because UpdateEnterprise only enforces checks when IS_SAAS is true, attackers can enumerate sequential enterprise IDs and overwrite logos, display names and branding for defacement and phishing.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00353 · 27.9th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-10-16T22:17Z
References (5)
https://github.com/53AI/53AIHub/blob/v0.5.3/api/controller/enterprise.go#L122-L160 · [email protected]https://github.com/53AI/53AIHub/blob/v0.5.3/api/router/api.go#L54-L66 · [email protected]https://hackmd.io/@hieuPenguinnn/53aihub-unauth-cross-tenant-enterprise-update · [email protected]https://www.vulncheck.com/advisories/53aihub-through-0.5.3-missing-authentication-via-put-api-enterprises-id · [email protected]https://hackmd.io/@hieuPenguinnn/53aihub-unauth-cross-tenant-enterprise-update · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 18 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 16 OCT 17:39Z
    53AIHub through 0.5.3 Missing Authentication via PUT /api/enterprises/:id
    cvelistv5
  • 16 OCT 17:39Z
    53AIHub through 0.5.3 Missing Authentication via PUT /api/enterprises/:id
    cvelistv5