CVE-2026-56254capacitor-updater - End-to-End Encryption Bypass via Private Key Distribution
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.0 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
- Weakness (CWE)
- CWE-320
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
capacitor-updater capacitor-updater capacitor_updater:capacitor_updater (from the name) | before 12.128.2; 12.128.2 not affected | CNA record |
References
- https://github.com/Cap-go/capgo/security/advisories/GHSA-j2f4-4pfc-p8rxvendor-advisory
- https://www.vulncheck.com/advisories/capacitor-updater-end-to-end-encryption-bypass-via-private-key-distributionthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.