{"id":"GHSA-9pwq-gcrx-wghh","revision":"a06e68252caa4d04811d6064c898614a","records":[{"revision":"a06e68252caa4d04811d6064c898614a","observedAt":"2026-10-24T13:19:54.901+00:00","statement":{"source":"osv","id":"GHSA-9pwq-gcrx-wghh","aliases":["CVE-2026-55406"],"title":"Buffa has a Use-After-Free in OwnedView via Unsound 'static Lifetime Promotion in Deref","description":"A soundness bug in `buffa`'s `OwnedView<V>` allowed safe Rust code to trigger a use-after-free. The `OwnedView::decode` constructor transmuted a borrowed slice to `&'static [u8]`, and the `Deref` implementation exposed the promoted `'static` lifetime on borrowed view fields (such as `&'static str` and `&'static [u8]`) to callers. Because these references appeared to be `'static`, the borrow checker permitted them to outlive the `OwnedView`; once the `OwnedView` was dropped and its backing buffer freed, those references became dangling, enabling memory corruption, information disclosure of freed heap contents, and cross-thread misuse — all without any `unsafe` code in the calling application. Users are advised to update to the latest patched version of buffa.\n\nThank you to hackerone.com/suul for reporting this issue.","state":0,"publishedAt":"2026-08-28T18:33:58+00:00","modifiedAt":"2026-08-28T18:45:07.6235956+00:00","affected":[{"ecosystem":"crates.io","name":"buffa","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.7.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/anthropics/buffa/security/advisories/GHSA-9pwq-gcrx-wghh","https://nvd.nist.gov/vuln/detail/CVE-2026-55406","https://github.com/anthropics/buffa/pull/154","https://github.com/anthropics/buffa/commit/7dcf50a1a40eca6ed8d6c6dd59f4310aa0d68b0e","https://github.com/anthropics/buffa","https://github.com/anthropics/buffa/releases/tag/v0.7.0"],"sourceUrl":"https://github.com/advisories/GHSA-9pwq-gcrx-wghh","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-9pwq-gcrx-wghh","identifiers":["GHSA-9pwq-gcrx-wghh","CVE-2026-55406"]},"retained":false,"historicalAffected":[]}],"coverage":[]}