# CVE-2026-28474: OpenClaw Nextcloud Talk allowlist bypass via display name spoofing

Source: https://junglewise.ai/threats/cve-2026-28474-openclaw-nextcloud-talk-allowlist-bypass-via-display-name  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-05. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-28474 · Severity: critical · CVSS 9.8 · Published 2026-03-05

OpenClaw's optional Nextcloud Talk plugin is used to integrate real-time messaging and collaboration features. An attacker with a Nextcloud account can change their display name to impersonate an allowlisted user and bypass restrictions on who can send direct messages or access specific chat rooms, potentially gaining unauthorized access to sensitive conversations.

Technologies: [Openclaw](https://junglewise.ai/threats/technologies/openclaw). Vendors: [npm](https://junglewise.ai/threats/vendors/npm), [Openclaw](https://junglewise.ai/threats/vendors/openclaw).

## Quick answers

**Is CVE-2026-28474 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-28474 being exploited in the wild.

**How severe is CVE-2026-28474?** Critical severity, with a CVSS score of 9.8, published 5 March 2026.

**Which products and versions are affected?** @openclaw/nextcloud-talk (npm) SEMVER:introduced=0,fixed=2026.2.6; Openclaw Nextcloud Talk <=2026.2.2.

**Is there a fix for CVE-2026-28474?** Yes. @openclaw/nextcloud-talk (npm): upgrade to 2026.2.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-28474 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-28474?** Check whether you run @openclaw/nextcloud-talk (npm), Openclaw Nextcloud Talk or Openclaw at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- @openclaw/nextcloud-talk (npm): upgrade to 2026.2.6 or later

  ```sh
  npm install @openclaw/nextcloud-talk@2026.2.6
  ```


## Technical details

The vulnerability is an authorization bypass (CWE-290) in the Nextcloud Talk allowlist matching logic. The plugin's webhook handler incorrectly validates sender identity by comparing the mutable actor.name (display name) field against allowlists, instead of using the stable actor.id identifier. An attacker can change their Nextcloud display name to match an allowlisted user ID and bypass direct message or room allowlists. The vulnerability is network-accessible via webhook payloads and requires no authentication beyond having a valid Nextcloud account. Fix: upgrade @openclaw/nextcloud-talk to version 2026.2.6 or later, which correctly uses actor.id for allowlist matching.

## Affected products

- OpenClaw Nextcloud Talk <=2026.2.2

## Identifiers

- CVE-2026-28474
- GHSA-r5h9-vjqc-hq3r

## Timeline

- 2026-02-17: disclosed
- 2026-02-07: patched: First fixed npm release 2026.2.6 published

## References

- [https://github.com/openclaw/openclaw/security/advisories/GHSA-r5h9-vjqc-hq3r](https://github.com/openclaw/openclaw/security/advisories/GHSA-r5h9-vjqc-hq3r)
- [https://github.com/openclaw/openclaw/commit/660f87278c9f292061e097441e0b10c20d62b31b](https://github.com/openclaw/openclaw/commit/660f87278c9f292061e097441e0b10c20d62b31b)

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