{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-56254","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-06-19T21:56:09.655Z","datePublished":"2026-07-10T13:57:52.184Z","dateUpdated":"2026-07-10T15:17:16.881Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-07-10T13:57:52.184Z"},"datePublic":"2026-02-10T00:00:00.000Z","title":"capacitor-updater - End-to-End Encryption Bypass via Private Key Distribution","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Key Management Errors","cweId":"CWE-320","type":"CWE"}]}],"affected":[{"vendor":"capacitor-updater","product":"capacitor-updater","defaultStatus":"unaffected","packageURL":"pkg:npm/capgo/capacitor-updater","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"12.128.2"},{"version":"12.128.2","status":"unaffected","versionType":"semver"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.3,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS"},{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L","version":"3.1"},"format":"CVSS"}],"references":[{"url":"https://github.com/Cap-go/capgo/security/advisories/GHSA-j2f4-4pfc-p8rx","name":"GitHub Security Advisory (GHSA-j2f4-4pfc-p8rx)","tags":["vendor-advisory"]},{"name":"VulnCheck Advisory: capacitor-updater - End-to-End Encryption Bypass via Private Key Distribution","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/capacitor-updater-end-to-end-encryption-bypass-via-private-key-distribution"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-10T15:17:07.705805Z","id":"CVE-2026-56254","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-10T15:17:16.881Z"}}]}}