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. 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

6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 38% of CVEs (scores of 2026-10-25)

CWE

CWE-306

Published

2026-10-16

Modified

2026-10-23

Record from

the NVD, synced 2026-10-24

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

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