{"id":"CVE-2026-122326","kind":"vulnerability","aliases":["CVE-2026-122326"],"related":[],"title":"Chevereto: authorization bypass lets users list other users' private albums","description":"Chevereto before 4.5.8 contains an authorization bypass vulnerability in the get-album-contents action of the /json route that allows unauthenticated attackers to list private albums by supplying another user's album id. Attackers with a session token from any public page and an album's encoded id can obtain image filenames, viewer and direct file URLs, and download private images.","summary":"Chevereto image hosting before 4.5.8 fails to check ownership in the get-album-contents action of its /json route. An attacker who supplies another user's album id can list private albums, image filenames and direct file URLs, and download private images.","severity":"medium","cvss":6.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["chevereto","image-hosting","package","self-hosted"],"not_affected_if":["chevereto-4.5.8-or-later"],"how_to_check":"- Check the installed Chevereto version in the application's admin dashboard or its composer/package metadata against `4.5.8`","fix":"- Chevereto: move to `4.5.8` or later","status":"open","published_at":"2026-11-05T16:17:45+00:00","first_seen_at":"2026-11-05T16:40:02+00:00","triaged_at":"2026-11-05T16:41:36+00:00","updated_at":"2026-11-05T16:41:36+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-05T16:41:36Z","model":"claude-haiku-5-5","output":{"fix":"- Chevereto: move to `4.5.8` or later","reach":"internet","title":"Chevereto: authorization bypass lets users list other users' private albums","impact":"medium","summary":"Chevereto image hosting before 4.5.8 fails to check ownership in the get-album-contents action of its /json route. An attacker who supplies another user's album id can list private albums, image filenames and direct file URLs, and download private images.","audience":"businesses","category":"package","nicknames":[],"who_cares":["chevereto","self-hosted","image-hosting"],"confidence":0.6,"fix_status":"available","needs_auth":"yes","worst_case":"private images and album contents readable by unauthenticated users","analyst_note":"Confirm the affected version range and default configuration from the NVD entry and the linked release notes; the sources do not state how the /json route is exposed by default.","how_to_check":"- Check the installed Chevereto version in the application's admin dashboard or its composer/package metadata against `4.5.8`\n- unknown","plain_action":"","needs_analyst":true,"not_affected_if":["chevereto-4.5.8-or-later"],"who_is_affected":"Any self-hosted Chevereto instance running a version before 4.5.8 is exposed through the /json get-album-contents action. Instances that do not expose the /json route to the internet are less reachable. The sources do not say whether default configurations are affected beyond this.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000689,"input_tokens":4290,"output_tokens":520,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-122326':13A,16A '-2026':12A,15A '/json':43B,85C '4.5.8':29B,70C 'action':40B,82C 'album':10A,38B,52B,57B,80C,94C,100C,113C 'allow':88C 'anoth':49B,97C 'attack':46B,90C,102C 'author':2A,73C 'bypass':3A,74C 'check':32B 'chevereto':1A,17B,25B,68C 'contain':71C 'content':39B,81C 'cve':11A,14A 'direct':61B,123C 'download':65B,127C 'encod':115C 'fail':30B 'file':62B,124C 'filenam':59B,120C 'get':37B,79C 'get-album-cont':36B,78C 'host':20B,24B,27B 'id':53B,101C,116C 'imag':19B,26B,58B,67B,119C,129C 'image-host':18B 'let':4A 'list':6A,55B,92C 'obtain':118C 'ownership':33B 'packag':21B 'page':110C 'privat':9A,56B,66B,93C,128C 'public':109C 'rout':44B,86C 'self':23B 'self-host':22B 'session':105C 'suppli':48B,96C 'token':106C 'unauthent':89C 'url':63B,125C 'user':5A,8A,50B,98C 'viewer':121C 'vulner':75C","nicknames":[],"mitigations":[],"who_affected":"Any self-hosted Chevereto instance running a version before 4.5.8 is exposed through the /json get-album-contents action. Instances that do not expose the /json route to the internet are less reachable. The sources do not say whether default configurations are affected beyond this.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["chevereto","imagehosting","medium","package","selfhosted"],"campaign_type":null,"first_public_at":"2026-11-05T16:17:45+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/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-2026-122326","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-122326","severity":null,"published_at":"2026-11-05T16:17:45+00:00","modified_at":"2026-11-05T16:17:45+00:00","first_seen_at":"2026-11-05T16:40:02+00:00","fetched_at":"2026-11-05T16:40:02+00:00","note":null}],"documents":[{"id":77628,"url":"https://github.com/chevereto/chevereto/commit/fe56eb789ecf5e26c84068ba7d88b7a20ea65f5c","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":77629,"url":"https://github.com/chevereto/chevereto/releases/tag/4.5.8","title":"Release notes: github.com","kind":"release","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Release notes: github.com"},{"id":77630,"url":"https://www.vulncheck.com/advisories/chevereto-before-4.5.8-private-album-image-disclosure-via-get-album-contents","title":"Third-party advisory: www.vulncheck.com","kind":"advisory","source":"nvd","publisher":"research","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":"Third-party advisory: www.vulncheck.com"}],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}