CVE-2026-32317

Summary

Cryptomator for Android offers multi-platform transparent client-side encryption for files in the cloud. Prior to version 1.12.3, an integrity check vulnerability allows an attacker tamper with the vault configuration file leading to a man-in-the-middle vulnerability in Hub key loading mechanism. Before this fix, the client trusted endpoints from the vault config without host authenticity checks, which could allow token exfiltration by mixing a legitimate auth endpoint with a malicious API endpoint. Impacted are users unlocking Hub-backed vaults with affected client versions in environments where an attacker can alter the vault.cryptomator file. This issue has been patched in version 1.12.3.

Affected Software

Weaknesses

• CWE-346: CWE-346: Origin Validation Error
• CWE-354: CWE-354: Improper Validation of Integrity Check Value
• CWE-451: CWE-451: User Interface (UI) Misrepresentation of Critical Information
• CWE-923: CWE-923: Improper Restriction of Communication Channel to Intended Endpoints

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/cryptomator/android/security/advisories/GHSA-876q-q3mm-fcvj
• https://github.com/cryptomator/android/releases/tag/1.12.3

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