Vulnerability-Lookup

CVE-2026-31863 (GCVE-0-2026-31863)

Vulnerability from cvelistv5 – Published: 2026-03-11 17:43 – Updated: 2026-03-12 13:52

Title

Improper Restriction of Excessive Authentication Attempts in github.com/anyproto/anytype-heart

Summary

Anytype Heart is the middleware library for Anytype. The challenge-based authentication for the local gRPC client API can be bypassed, allowing an attacker to gain access without the 4-digit code. This vulnerability is fixed in anytype-heart 0.48.4, anytype-cli 0.1.11, and Anytype Desktop 0.54.5.

Severity

3.6 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-12 13:52 UTC

CWE

CWE-307 - Improper Restriction of Excessive Authentication Attempts

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/anyproto/anytype-heart/securit…	x_refsource_CONFIRM

Impacted products

3 products

Vendor	Product	Version	CPE status
anyproto	anytype-heart	Affected: < 0.48.4	guessed
anyproto	anytype-cli	Affected: < 0.1.11	guessed
anyproto	anytype-ts	Affected: < 0.54.5	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-31863

Vulnerability from fkie_nvd - Published: 2026-03-11 18:16 - Updated: 2026-06-17 10:34

Severity

3.6 (Low) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
4.4 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/anyproto/anytype-heart/security/advisories/GHSA-vv3h-7qwr-722v	Patch, Vendor Advisory

Impacted products

Vendor	Product	Version
anytype	anytype_cli	*
anytype	anytype_desktop	*
anytype	anytype_heart	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "anytype-heart",
          "vendor": "anyproto",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.48.4"
            }
          ]
        },
        {
          "product": "anytype-cli",
          "vendor": "anyproto",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.1.11"
            }
          ]
        },
        {
          "product": "anytype-ts",
          "vendor": "anyproto",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.54.5"
            }
          ]
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      ],
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    },
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GHSA-VV3H-7QWR-722V

Vulnerability from github – Published: 2026-03-11 15:33 – Updated: 2026-03-24 21:11

Summary

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

Details

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: v0.54.5
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.

Severity

3.6 (Low)


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

Show details on source website

JSON

To clipboard

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        "name": "github.com/anyproto/anytype-heart"
      },
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    "github_reviewed": true,
    "github_reviewed_at": "2026-03-11T15:33:29Z",
    "nvd_published_at": "2026-03-11T18:16:25Z",
    "severity": "LOW"
  },
  "details": "#### Impact\nThe challenge-based authentication for the local gRPC client API can be bypassed, allowing an attacker to gain access without the 4-digit code.\n\nAffected components:\n- Anytype Desktop (all platforms) \u2264 v0.48.2\n- Anytype-CLI (headless deployments) \u2264 v0.1.9\n\nNot affected:\n- Anytype mobile apps (iOS, Android) - do not expose a local gRPC server\n\nWho is impacted:\nThis 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.\n\n### Exploitation requires:\n- Local user-level access to the machine running Anytype\n- Discovery of the randomized listening port\n- A running Anytype instance\n\nAnytype-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\nexposes 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.**\n\n#### Patches\n- anytype-heart library: v0.48.4\n- [Anytype Desktop](https://github.com/anyproto/anytype-ts): v0.54.5\n- [Anytype-CLI](https://github.com/anyproto/anytype-cli): v0.1.11\n\n#### Workarounds\n- Desktop users: No immediate action required. The vulnerability requires existing local access to the machine.\n- Anytype-CLI administrators: If using a custom reverse proxy, ensure it does not expose gRPC or gRPC-Web ports to external networks.",
  "id": "GHSA-vv3h-7qwr-722v",
  "modified": "2026-03-24T21:11:53Z",
  "published": "2026-03-11T15:33:29Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/anyproto/anytype-heart/security/advisories/GHSA-vv3h-7qwr-722v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31863"
    },
    {
      "type": "WEB",
      "url": "https://github.com/anyproto/anytype-cli"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/anyproto/anytype-heart"
    },
    {
      "type": "WEB",
      "url": "https://github.com/anyproto/anytype-ts"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2026-4680"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Anytype Heart\u0027s gRPC API client challenge verification can be bypassed on localhost"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-31863 (GCVE-0-2026-31863)

FKIE_CVE-2026-31863

GHSA-VV3H-7QWR-722V

Impact

Exploitation requires:

Patches

Workarounds

Tags

Sightings

Nomenclature

Related by attack behaviour