{"id":"CVE-2026-107810","kind":"vulnerability","aliases":["CVE-2026-107810","GHSA-p8v3-89rh-jxc7","GO-2026-6707"],"related":[],"title":"Nginx UI: Backup restore follows crafted symlinks into the live Nginx configuration path before restore flags are applied in github.com/0xJacky/Nginx-UI","description":"Nginx UI is a web user interface for the Nginx web server. From 2.0.0 until 2.5.0, internal/backup/restore.go extracts inner archives before applying the restore_nginx and restore_nginx_ui flags and permits symlinks targeting the live Nginx configuration path. An authenticated user who can create and restore backups can craft a valid backup that places a symlink in the staging tree and then writes a regular file through that link, even when both restore flags are false. This can persistently inject configuration or cause denial of service when the modified files are later consumed. This issue is fixed in version 2.5.0.","summary":"Nginx UI, a web interface for managing Nginx, extracts backup archives before checking the restore flags and allows symlinks that point into the live Nginx config path. An authenticated user who can create and restore backups can write arbitrary files into the live Nginx configuration, even with both restore flags disabled, enabling persistent config injection or denial of service.","severity":"high","cvss":8.1,"epss":0.00392,"exploited":false,"exploited_at":null,"products":[{"name":"github.com/0xJacky/Nginx-UI","fixed":["1.9.10-0.20260728074146-a467ed652591"],"affected":">= 1.9.10-0.20250517140552-daee3ac7ade1, < 1.9.10-0.20260728074146-a467ed652591","ecosystem":"go"}],"ecosystems":["go"],"tags":["go","nginx","nginx-ui","package","self-hosted"],"not_affected_if":["default-config"],"how_to_check":"Check the version of github.com/0xJacky/Nginx-UI in go.mod or the running binary; affected range per sources is up to 1.9.10-0.20260728074146-a467ed652591 (exclusive), starting from 1.9.10-0.20250517140552-daee3ac7ade1.","fix":"Upgrade github.com/0xJacky/Nginx-UI to 1.9.10-0.20260728074146-a467ed652591 or later (the description states the fix is in 2.5.0).\nRestrict backup restore permissions to trusted administrators until patched.","status":"open","published_at":"2026-10-09T16:17:25+00:00","first_seen_at":"2026-10-23T19:13:08+00:00","triaged_at":"2026-10-23T19:52:50+00:00","updated_at":"2026-10-23T19:52:50+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-23T19:52:50Z","model":"claude-haiku-5-5","output":{"fix":"Upgrade github.com/0xJacky/Nginx-UI to 1.9.10-0.20260728074146-a467ed652591 or later (the description states the fix is in 2.5.0).\nRestrict backup restore permissions to trusted administrators until patched.","summary":"Nginx UI, a web interface for managing Nginx, extracts backup archives before checking the restore flags and allows symlinks that point into the live Nginx config path. An authenticated user who can create and restore backups can write arbitrary files into the live Nginx configuration, even with both restore flags disabled, enabling persistent config injection or denial of service.","category":"package","who_cares":["nginx-ui","self-hosted","nginx","go"],"confidence":0.7,"analyst_note":"Sources conflict on version: the description says 2.0.0 to 2.5.0 fixed in 2.5.0, while the product range lists a Go pseudo-version up to 1.9.10-0.20260728074146; confirm the affected release line at https://pkg.go.dev/vuln/GO-2026-6707 and https://nvd.nist.gov/vuln/detail/CVE-2026-107810.","how_to_check":"Check the version of github.com/0xJacky/Nginx-UI in go.mod or the running binary; affected range per sources is up to 1.9.10-0.20260728074146-a467ed652591 (exclusive), starting from 1.9.10-0.20250517140552-daee3ac7ade1.\nunknown","needs_analyst":true,"not_affected_if":["default-config"],"severity_if_unknown":"high"},"cost_usd":0.000504,"input_tokens":2325,"output_tokens":542,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-107810':25A,36A '-2026':24A,32A,35A '-6707':33A '/0xjacky/nginx-ui':22A,39A '2.0.0':121C '2.5.0':123C,208C '89rh':29A 'allow':66B 'appli':18A,129C 'arbitrari':87B 'archiv':59B,127C 'authent':77B,148C 'backup':3A,58B,84B,155C,160C 'caus':191C 'check':61B 'config':74B,102B 'configur':12A,93B,145C,189C 'consum':201C 'craft':6A,157C 'creat':81B,152C 'cve':23A,34A 'denial':105B,192C 'disabl':99B 'enabl':100B 'even':94B,178C 'extract':57B,125C 'fals':184C 'file':88B,174C,198C 'fix':205C 'flag':16A,64B,98B,137C,182C 'follow':5A 'ghsa':27A 'ghsa-p8v3-89rh-jxc7':26A 'github.com':21A,38A 'github.com/0xjacky/nginx-ui':20A,37A 'go':31A,40B 'host':48B 'inject':103B,188C 'inner':126C 'interfac':53B,114C 'internal/backup/restore.go':124C 'issu':203C 'jxc7':30A 'later':200C 'link':177C 'live':10A,72B,91B,143C 'manag':55B 'modifi':197C 'nginx':1A,11A,41B,43B,49B,56B,73B,92B,108C,117C,132C,135C,144C 'nginx-ui':42B 'p8v3':28A 'packag':45B 'path':13A,75B,146C 'permit':139C 'persist':101B,187C 'place':162C 'point':69B 'regular':173C 'restor':4A,15A,63B,83B,97B,131C,134C,154C,181C 'self':47B 'self-host':46B 'server':119C 'servic':107B,194C 'stage':167C 'symlink':7A,67B,140C,164C 'target':141C 'tree':168C 'ui':2A,44B,50B,109C,136C 'user':78B,113C,149C 'valid':159C 'version':207C 'web':52B,112C,118C 'write':86B,171C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-09T16:17:25+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","cvss_by":"security-advisories@github.com","poc_count":0,"sources":[{"source":"govuln","external_id":"GO-2026-6707","url":"https://pkg.go.dev/vuln/GO-2026-6707","severity":null,"published_at":"2026-10-19T21:08:26+00:00","modified_at":"2026-10-19T21:08:26+00:00","first_seen_at":"2026-10-23T19:13:08+00:00","fetched_at":"2026-10-23T19:13:08+00:00","note":null},{"source":"epss","external_id":"CVE-2026-107810","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-107810","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:43+00:00","fetched_at":"2026-10-23T19:13:43+00:00","note":null},{"source":"nvd","external_id":"CVE-2026-107810","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107810","severity":null,"published_at":"2026-10-09T16:17:25+00:00","modified_at":"2026-10-20T15:08:56+00:00","first_seen_at":"2026-10-23T19:35:23+00:00","fetched_at":"2026-10-23T19:35:23+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"}