{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.7.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7dcf50a1a40eca6ed8d6c6dd59f4310aa0d68b0e"
            },
            {
              "fixed": "9ce9ab74e4ea18c3abda901b4054fea3fa193349"
            }
          ],
          "repo": "https://github.com/anthropics/buffa",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9pwq-gcrx-wghh"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-200",
      "CWE-416"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55406.json"
  },
  "details": "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\u003cV\u003e type allowed safe Rust code to trigger a use-after-free: the OwnedView::decode constructor transmuted a borrowed slice to \u0026'static [u8], and the Deref implementation exposed the promoted 'static lifetime on borrowed view fields (such as \u0026'static str and \u0026'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.",
  "id": "CVE-2026-55406",
  "modified": "2026-07-18T03:42:01.985289798Z",
  "published": "2026-07-16T15:54:29.511Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/anthropics/buffa/releases/tag/v0.7.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55406.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/anthropics/buffa/security/advisories/GHSA-9pwq-gcrx-wghh"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55406"
    },
    {
      "type": "FIX",
      "url": "https://github.com/anthropics/buffa/commit/7dcf50a1a40eca6ed8d6c6dd59f4310aa0d68b0e"
    },
    {
      "type": "FIX",
      "url": "https://github.com/anthropics/buffa/pull/154"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Buffa: Use-After-Free in OwnedView via Unsound 'static Lifetime Promotion in Deref"
}