{"id":"CVE-2026-56254","state":"PUBLISHED","title":"capacitor-updater - End-to-End Encryption Bypass via Private Key Distribution","description":"In @capgo/capacitor-updater (Cap-go/capgo) before 12.128.2, the end-to-end encryption scheme distributes the private key to each device that downloads the app. Because the public key can be derived from the private key, an attacker performing a man-in-the-middle attack or compromising the Capgo server can create a validly signed update bundle and cause devices to install an update not produced by the original app maker.","publishedAt":"2026-07-10T13:57:52.184Z","updatedAt":"2026-10-08T15:23:22.601Z","severity":{"score":8.3,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["capacitor-updater capacitor-updater"],"affected":[{"vendor":"capacitor-updater","product":"capacitor-updater","packageURL":"pkg:npm/%40capgo/capacitor-updater","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"12.128.2","versionType":"semver"},{"version":"12.128.2","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/Cap-go/capgo/security/advisories/GHSA-j2f4-4pfc-p8rx","https://www.vulncheck.com/advisories/capacitor-updater-end-to-end-encryption-bypass-via-private-key-distribution"],"weaknesses":["CWE-320"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/56xxx/CVE-2026-56254.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-56254","state":"PUBLISHED","datePublished":"2026-07-10T13:57:52.184Z","dateUpdated":"2026-10-08T15:23:22.601Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-06-19T21:56:09.655Z"},"containers":{"cna":{"title":"capacitor-updater - 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