CVE-2026-111653
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.
Does this matter?
Lower severity and a low EPSS score (0.45%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 4.0
- 6.9 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.45% probability · 39th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-306
- Source
- disclosure@vulncheck.com
EPSS moved from 0.4% on 17 October 2026 to 0.4% on 26 October 2026.
References
- https://github.com/53AI/53AIHub/blob/v0.5.3/api/controller/enterprise.go#L122-L160
- https://github.com/53AI/53AIHub/blob/v0.5.3/api/router/api.go#L54-L66
- https://hackmd.io/@hieuPenguinnn/53aihub-unauth-cross-tenant-enterprise-update
- https://www.vulncheck.com/advisories/53aihub-through-0.5.3-missing-authentication-via-put-api-enterprises-id
- https://hackmd.io/@hieuPenguinnn/53aihub-unauth-cross-tenant-enterprise-update
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.