{"cve":"CVE-2026-55406","nvd":{"published":"2026-07-16T17:16:57.623","modified":"2026-10-24T20:10:00.137","status":"Deferred","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.","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":5.9},"cvss_v3":null,"cwes":["CWE-200","CWE-416"],"references":["https://github.com/anthropics/buffa/commit/7dcf50a1a40eca6ed8d6c6dd59f4310aa0d68b0e","https://github.com/anthropics/buffa/pull/154","https://github.com/anthropics/buffa/releases/tag/v0.7.0","https://github.com/anthropics/buffa/security/advisories/GHSA-9pwq-gcrx-wghh"],"products":[],"source":"nvd","synced_at":"2026-10-25T17:50:08.599881581+00:00"},"epss":{"cve":"CVE-2026-55406","score":0.00193,"percentile":0.08932,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-9pwq-gcrx-wghh","url":"https://osv.dev/vulnerability/GHSA-9pwq-gcrx-wghh","summary":"Buffa has a Use-After-Free in OwnedView via Unsound 'static Lifetime Promotion in Deref","modified":"2026-08-28T18:45:07.623595565Z","packages":[{"ecosystem":"crates.io","name":"buffa","purl":"pkg:cargo/buffa","ranges":["<0.7.0"],"fixed":["0.7.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}