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

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

3.6 · CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS

• CVE-2026-31863: 0.11% estimated exploitation activity in the next 30 days; percentile 1.34 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

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 -…

Published by the source

11 Mar 2026, 15:33 UTC

Last modified by the source

24 Mar 2026, 21:11 UTC

Source last checked

26 Oct 2026, 15:18 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-vv3h-7qwr-722v

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-31863

Advisory: Anytype Heart's gRPC API client challenge verification can be bypassed on localhost
IDs: CVE-2026-31863, GHSA-vv3h-7qwr-722v
Record: https://patchnext.com/advisories/cve-2026-31863 (revision 1, source checked 26 Oct 2026, 15:18 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 3.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/anyproto/anytype-heart 0.48.4; github.com/anyproto/anytype-cli 0.1.11. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/anyproto/anytype-heart: affected < 0.48.4; fixed in 0.48.4
- Go github.com/anyproto/anytype-cli: affected < 0.1.11; fixed in 0.1.11

## Suggested inspection (read-only)
- Go github.com/anyproto/anytype-heart: check the installed version with your package manager.
- Go github.com/anyproto/anytype-cli: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/anyproto/anytype-heart, github.com/anyproto/anytype-cli.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-vv3h-7qwr-722v (GitHub-reviewed advisory GHSA-vv3h-7qwr-722v lists affected ranges: Go github.com/anyproto/anytype-heart >=0 =0 <0.1.11)

Commands are suggestions: review each one before running it.