EUVD-2026-9920Published

OpenClaw Nextcloud Talk < 2026.2.6 - Allowlist Bypass via actor.name Display Name Spoofing

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cve-program · CVE-2026-28474

Published

OpenClaw's Nextcloud Talk plugin versions prior to 2026.2.6 accept equality matching on the mutable actor.name display name field for allowlist validation, allowing attackers to bypass DM and room allowlists. An attacker can change their Nextcloud display name to match an allowlisted user ID and gain unauthorized access to restricted conversations.

Source published: 5 Mar 2026 21:59:49 UTC
Source modified: 17 Sep 2026 17:54:15 UTC
Saved here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1 · 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

euvd · EUVD-2026-9920

Published

Additional publisher context

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

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datePublished: Mar 5, 2026, 9:59:49 PM

dateUpdated: Sep 17, 2026, 5:54:15 PM

1 related source bulletins · separate from aliases

WID-SEC-W-2026-0424: OpenClaw: Mehrere Schwachstellen

CVE-2026-28391 · CVE-2026-28392 · CVE-2026-28393 · CVE-2026-28395 · CVE-2026-28446 · CVE-2026-28447 · CVE-2026-28448 · CVE-2026-28450 · CVE-2026-28451 · CVE-2026-28452 · CVE-2026-28453 · CVE-2026-28454 · CVE-2026-28456 · CVE-2026-28457 · CVE-2026-28458 · CVE-2026-28459 · CVE-2026-28462 · CVE-2026-28463 · CVE-2026-28464 · CVE-2026-28465 · CVE-2026-28466 · CVE-2026-28467 · CVE-2026-28468 · CVE-2026-28469 · CVE-2026-28470 · CVE-2026-28471 · CVE-2026-28472 · CVE-2026-28473 · CVE-2026-28474 · CVE-2026-28475 · CVE-2026-28476 · CVE-2026-28477 · CVE-2026-28478 · CVE-2026-28480 · CVE-2026-28481 · CVE-2026-28482 · CVE-2026-28485 · CVE-2026-28486 · CVE-2026-29606 · CVE-2026-29609 · CVE-2026-29610 · CVE-2026-29611 · CVE-2026-29612 · CVE-2026-29613

Source published: Mar 5, 2026, 9:59:49 PM (timezone not stated)
Source modified: Sep 17, 2026, 5:54:15 PM (timezone not stated)
Saved here: 11 Nov 2026 07:33:40 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

EUVD CVSS 4.0 · 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

nvd · CVE-2026-28474

Published

Additional publisher context

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-863

Original publisher date fields

published: 2026-03-05T22:16:21.423

lastModified: 2026-09-17T18:16:40.903

1 source CPE criteria · context only

cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 5 Mar 2026 22:16:21 UTC
Source modified: 17 Sep 2026 18:16:40 UTC
Saved here: 25 Oct 2026 07:19:03 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · [email protected] · Secondary · 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS 3.1 · [email protected] · Secondary · 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

osv · GHSA-r5h9-vjqc-hq3r

Published

## Summary In affected versions of the optional Nextcloud Talk plugin (installed separately; not bundled with the core OpenClaw install), an untrusted webhook field (`actor.name`, display name) could be treated as an allowlist identifier. An attacker could change their Nextcloud display name to match an allowlisted user ID and bypass DM or room allowlists. ## Details Nextcloud Talk webhook payloads provide a stable sender identifier (`actor.id`) and a mutable display name (`actor.name`). In affected versions, the plugin’s allowlist matching accepted equality on the display name, which is attacker-controlled. ## Affected Packages / Versions - Package: `@openclaw/nextcloud-talk` (npm) - Affected: `<= 2026.2.2` - Fixed: `>= 2026.2.6` Note: This advisory applies to the optional Nextcloud Talk plugin package. Core `openclaw` is not impacted unless you installed and use `@openclaw/nextcloud-talk`. ## Fix Commit(s) - [6b4b6049b47c3329a7014509594647826669892d](https://github.com/openclaw/openclaw/commit/6b4b6049b47c3329a7014509594647826669892d) ## Timeline - Introduced: [660f87278c9f292061e097441e0b10c20d62b31b](https://github.com/openclaw/openclaw/commit/660f87278c9f292061e097441e0b10c20d62b31b) (2026-01-20) - Fixed in repo: [6b4b6049b47c3329a7014509594647826669892d](https://github.com/openclaw/openclaw/commit/6b4b6049b47c3329a7014509594647826669892d) (2026-02-04 UTC) - First fixed tag containing the change: [v2026.2.3](https://github.com/openclaw/openclaw/releases/tag/v2026.2.3) - First fixed npm release of `@openclaw/nextcloud-talk`: `2026.2.6` (published 2026-02-07 UTC) ## Mitigation Upgrade `@openclaw/nextcloud-talk` to `>= 2026.2.6`. ## Release Process Note The patched version range is set to the first npm release that contains the fix. Once you are ready, you can publish this advisory without additional version edits. Thanks @MegaManSec (https://joshua.hu) of [AISLE Research Team](https://aisle.com/) for reporting.

Source published: 17 Feb 2026 21:36:15 UTC
Source modified: 5 Mar 2026 22:11:22 UTC
Saved here: 24 Oct 2026 13:17:17 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Publisher rating · CRITICAL