🛡️ CVE-2026-31863 — anytype-cli

🟢 CVSS 3.6 — Low ✅ No Known Exploit CWE-307 NVD
3.6
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Anytype Heart's gRPC API client challenge verification can be bypassed on localhost

Impact

The challenge-based authentication for the local gRPC client API can be bypassed, allowing an attacker to gain access without the 4-digit code.

Affected components:

  • Anytype Desktop (all platforms) ≤ v0.48.2
  • Anytype-CLI (headless deployments) ≤ v0.1.9

Not affected:

  • Anytype mobile apps (iOS, Android) - do not expose a local gRPC server

Who is impacted:

This vulnerability is scoped to localhost. The gRPC and gRPC-Web ports bind to 127.0.0.1 only and are not exposed to the local network or internet.

Exploitation requires:

  • Local user-level access to the machine running Anytype
  • Discovery of the randomized listening port
  • A running Anytype instance

Anytype-CLI headless deployments may be at higher risk only if an administrator has chosen to set up their own reverse proxy and configured it in a way that

exposes gRPC or gRPC-Web ports to an external network. By default, these ports are not externally accessible and there is no built-in mechanism to expose them.

Patches

  • anytype-heart library: v0.48.4
  • [Anytype Desktop](https://github.com/anyproto/anytype-ts): v0.54.5
  • [Anytype-CLI](https://github.com/anyproto/anytype-cli): v0.1.11

Workarounds

  • Desktop users: No immediate action required. The vulnerability requires existing local access to the machine.
  • Anytype-CLI administrators: If using a custom reverse proxy, ensure it does not expose gRPC or gRPC-Web ports to external networks.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is high, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability none.

Weakness class

CVE-2026-31863 is classified as CWE-307: Improper Restriction of Excessive Authentication Attempts. Repeated login attempts are not limited, leaving credentials open to brute forcing.

Affected software

CVE-2026-31863 is recorded against 5 packages.

  • anytype-cli (fixed in 0.1.11)
  • anytype-desktop (fixed in 0.54.5)
  • anytype-heart (fixed in 0.48.4)
  • github.com/anyproto/anytype-cli
  • github.com/anyproto/anytype-heart

Timeline and source

Published on 11 March 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com

Details

Severity LOW
CVSS Score 3.6
CVSS Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
CWE CWE-307
Public Exploit ✅ No
Source NVD
Published 2026-03-11
Updated 2026-08-12
Modified 2026-06-17

Affected Packages

Software From version Fixed in
anytype-cli — 0.1.11
anytype-desktop — 0.54.5
anytype-heart — 0.48.4
github.com/anyproto/anytype-cli — —
github.com/anyproto/anytype-heart — —

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