{"id":"CVE-2026-111653","kind":"vulnerability","aliases":["CVE-2026-111653"],"related":[],"title":"53AIHub: unauthenticated PUT overwrites any enterprise profile and branding","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.","summary":"53AIHub through 0.5.3 lets unauthenticated attackers send PUT requests to /api/enterprises/:id and overwrite any enterprise's profile. Attackers can enumerate sequential enterprise IDs to change logos, display names and branding for defacement or phishing.","severity":"medium","cvss":6.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["53aihub","ai-tooling","saas","self-hosted"],"not_affected_if":["default-config"],"how_to_check":"- Check the installed 53AIHub version; the sources say versions through 0.5.3 are affected.\n- Check whether the deployment runs with `IS_SAAS` enabled, since the sources say the authorization checks only apply when it is true.\n- Look for unauthenticated PUT requests to `/api/enterprises/:id` in web server or proxy logs.","fix":"- Upgrade 53AIHub past `0.5.3`; the sources do not name a fixed version, so check the vendor release notes.\n- Until patched, block or require authentication on PUT `/api/enterprises/:id` at the reverse proxy.","status":"open","published_at":"2026-10-16T18:17:46+00:00","first_seen_at":"2026-10-23T21:57:13+00:00","triaged_at":"2026-10-25T03:42:26+00:00","updated_at":"2026-10-25T03:42:26+00:00","category":"ai-tooling","confidence":0.6,"triage":{"at":"2026-10-25T03:42:26Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade 53AIHub past `0.5.3`; the sources do not name a fixed version, so check the vendor release notes.\n- Until patched, block or require authentication on PUT `/api/enterprises/:id` at the reverse proxy.","reach":"internet","title":"53AIHub: unauthenticated PUT overwrites any enterprise profile and branding","impact":"medium","summary":"53AIHub through 0.5.3 lets unauthenticated attackers send PUT requests to /api/enterprises/:id and overwrite any enterprise's profile. Attackers can enumerate sequential enterprise IDs to change logos, display names and branding for defacement or phishing.","category":"ai-tooling","nicknames":[],"who_cares":["53aihub","self-hosted","saas"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker overwrites enterprise logos and names for phishing or defacement.","analyst_note":"Confirm the IS_SAAS dependency and the fixed version from the NVD entry or the 53AIHub repository.","how_to_check":"- Check the installed 53AIHub version; the sources say versions through 0.5.3 are affected.\n- Check whether the deployment runs with `IS_SAAS` enabled, since the sources say the authorization checks only apply when it is true.\n- Look for unauthenticated PUT requests to `/api/enterprises/:id` in web server or proxy logs.","needs_analyst":true,"not_affected_if":["default-config"],"who_is_affected":"53AIHub deployments up to and including 0.5.3 are exposed to unauthenticated profile overwrites, per the sources. The sources say the missing check applies only when IS_SAAS is true, so self-hosted instances without that flag may not be affected, but the sources do not confirm this. Teams running 53AIHub exposed to the internet should review it first.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"unknown"},"cost_usd":0.000677,"input_tokens":3360,"output_tokens":682,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-111653':12A,15A '-2026':11A,14A '/api/enterprises':34B,82C '0.5.3':26B,61C '53aihub':1A,16B,24B,59C 'ai':18B 'ai-tool':17B 'allow':68C 'attack':29B,42B,70C,94C 'authent':65C 'brand':9A,54B,106C 'chang':49B 'check':88C 'contain':62C 'cve':10A,13A 'defac':56B,108C 'display':51B,103C 'enforc':87C 'enterpris':6A,39B,46B,74C,98C 'enumer':44B,96C 'host':23B 'id':35B,47B,83C,99C 'let':27B 'logo':50B,102C 'miss':64C 'name':52B,104C 'overwrit':4A,37B,72C,101C 'phish':58B,110C 'profil':7A,41B,76C 'put':3A,31B,79C 'request':32B,80C 'saa':20B,91C 'self':22B 'self-host':21B 'send':30B,78C 'sequenti':45B,97C 'tool':19B 'true':93C 'unauthent':2A,28B,69C 'updateenterpris':85C 'vulner':66C","nicknames":[],"mitigations":[],"who_affected":"53AIHub deployments up to and including 0.5.3 are exposed to unauthenticated profile overwrites, per the sources. The sources say the missing check applies only when IS_SAAS is true, so self-hosted instances without that flag may not be affected, but the sources do not confirm this. Teams running 53AIHub exposed to the internet should review it first.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-16T18:17:46+00:00","kev":null,"cvss_vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-111653","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111653","severity":null,"published_at":"2026-10-16T18:17:46+00:00","modified_at":"2026-10-23T17:17:21+00:00","first_seen_at":"2026-10-23T21:57:13+00:00","fetched_at":"2026-10-23T22:28:55+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}