OpenClaw Chutes manual OAuth state validation bypass can cause credential substitution

Exploitation

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

CVSS 4.0

5.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2026-28477: 0.16% estimated exploitation activity in the next 30 days; percentile 4.93 (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.

Summary The manual Chutes OAuth login flow could accept attacker-controlled callback input in a way that bypassed OAuth CSRF state validation, potentially resulting in credential substitution. Impact If an attacker can convince a user to paste attacker-provided OAuth callback data during the manual login prompt, OpenClaw may exchange an attacker-obtained authorization code and persist tokens for the wrong Chutes account. The automatic local callback flow is not affected (it validates state in the local HTTP callback handler). Affected Packages / Versions - openclaw (npm): <= 2026.2.13 when using the manual Chutes OAuth login flow. Fix The manual flow now requires the full redirect URL (must include code and state), validates the returned state against the expected value, and rejects code-only pastes. Fix Commit(s) - a99ad11a4107ba8eac58f54a3c1a8a0cf5686f47 Thanks @aether-ai-agent for reporting.

Published by the source

18 Feb 2026, 17:41 UTC

Last modified by the source

6 Mar 2026, 01:17 UTC

Source last checked

26 Oct 2026, 12:43 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-7rcp-mxpq-72pj

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-7rcp-mxpq-72pj

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# Patch Next advisory brief: CVE-2026-28477

Advisory: OpenClaw Chutes manual OAuth state validation bypass can cause credential substitution
IDs: CVE-2026-28477, GHSA-7rcp-mxpq-72pj
Record: https://patchnext.com/advisories/cve-2026-28477 (revision 3, source checked 26 Oct 2026, 12:43 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: openclaw 2026.2.14. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm openclaw: affected < 2026.2.14; fixed in 2026.2.14

## Suggested inspection (read-only)
- `npm ls openclaw --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## 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 openclaw.
- 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://osv.dev/vulnerability/GHSA-7rcp-mxpq-72pj (OSV record GHSA-7rcp-mxpq-72pj lists affected ranges: npm openclaw >=0 <2026.2.14 (fixed))
- Verified: https://github.com/advisories/GHSA-7rcp-mxpq-72pj (GitHub-reviewed advisory GHSA-7rcp-mxpq-72pj lists affected ranges: npm openclaw >=0 <2026.2.14)

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