{"id":"CVE-2026-55406","revision":"bdb8408e07ac4395857f2fc2cae436e3","records":[{"revision":"bdb8408e07ac4395857f2fc2cae436e3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-55406","aliases":[],"title":"Buffa: Use-After-Free in OwnedView via Unsound 'static Lifetime Promotion in Deref","description":"Buffa is a pure-Rust Protocol Buffers implementation with first-class protobuf editions support. Prior to 0.7.0, a soundness bug in the OwnedView<V> type 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, so the borrow checker permitted those references to outlive the OwnedView; once the OwnedView was dropped and its backing buffer freed, the references became dangling, enabling memory corruption, information disclosure of freed heap contents, and cross-thread misuse without any unsafe code in the calling application. This issue is fixed in version 0.7.0.","state":0,"publishedAt":"2026-07-16T15:54:29.511+00:00","modifiedAt":"2026-07-16T16:47:37.717+00:00","affected":[{"ecosystem":"Vendor product","name":"buffa","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"anthropics\",\n                    \"product\": \"buffa\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.7.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","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":5.9,"severity":"MEDIUM"}],"references":["https://github.com/anthropics/buffa/security/advisories/GHSA-9pwq-gcrx-wghh","https://github.com/anthropics/buffa/pull/154","https://github.com/anthropics/buffa/commit/7dcf50a1a40eca6ed8d6c6dd59f4310aa0d68b0e","https://github.com/anthropics/buffa/releases/tag/v0.7.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-55406","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-55406","identifiers":["CVE-2026-55406"]},"retained":false,"historicalAffected":[]}],"coverage":[]}