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GHSA-39mp-545q-w789 CVE-2026-35620

OpenClaw: Non-owner command-authorized sender can change the owner-only `/send` session delivery policy

Medium npm
Severity
0.0 / 10
Medium · CVSS 4.0
Exploit chance (EPSS)
0.44%
Chance of exploitation in the next 30 days. Higher than 38.48% of scored vulnerabilities.
Known exploited
No
Not in CISA's catalog
Weakness
CWE-285 Improper Authorization
CWE-862 Missing Authorization
Fix
2026.3.24
Upgrade openclaw to this version or later

Description

Fixed in OpenClaw 2026.3.24, the current shipping release.

Title
Non-owner command-authorized sender can change the owner-only /send session delivery policy

CWE
CWE-285 Improper Authorization

CVSS v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Base score: 5.4 (Medium)

Severity Assessment
Medium. This is a real owner-only authorization bypass, but the demonstrated impact is limited to persistent mutation of the current session’s delivery policy rather than direct code execution, sandbox escape, or cross-host compromise.

Impact
A non-owner sender who is allowed to run commands can invoke /send on|off|inherit and persistently change the current session’s sendPolicy, even though OpenClaw documents /send as owner-only.

That lets a lower-trust participant:

  • disable reply delivery for the current session (/send off), suppressing future replies in that chat;
  • re-enable reply delivery (/send on) after the owner intentionally disabled it;
  • remove the session override (/send inherit).

Affected Component
Verified against the latest published GitHub release tag v2026.3.23 (ccfeecb6887cd97937e33a71877ad512741e82b2), published 2026-03-23T23:15:50Z.

Exact vulnerable path on the shipped tag:

  • src/auto-reply/reply/commands-session.ts:212-239
    • handleSendPolicyCommand(...) checks only params.command.isAuthorizedSender.
    • when true, it mutates params.sessionEntry.sendPolicy and persists the session entry.

Authorization behavior that makes this reachable:

  • src/auto-reply/command-auth.ts:401-407
    • senderIsOwner is computed separately from general command authorization.
  • src/auto-reply/command-auth.ts:420-429
    • command authorization can succeed even when senderIsOwner === false.
  • src/auto-reply/command-auth.owner-default.test.ts:10-47
    • existing coverage confirms a sender can be command-authorized while not treated as owner.

Documented owner-only contract:

  • docs/tools/slash-commands.md:112
    • /send on|off|inherit is documented as owner-only.
  • docs/concepts/session-tool.md:156
    • sendPolicy is documented as settable via sessions.patch or owner-only /send on|off|inherit.

Related privilege model:

  • src/gateway/method-scopes.ts:131-133
    • sessions.patch is admin-scoped, which reinforces that session-delivery-policy mutation is treated as privileged state.

Version history:

  • The vulnerable handler exists in release history going back at least to commit ea018a68ccb92dbc735bc1df9880d5c95c63ca35 (refactor(auto-reply): split reply pipeline).
  • Earliest released affected tag found: v2026.1.14-1
  • Latest released affected tag verified: v2026.3.23

Technical Reproduction

  1. Check out the shipped release tag v2026.3.23.
  2. Configure a channel where:
    • a non-owner sender is allowed to run commands, for example through commands.allowFrom;
    • the owner identity is distinct, for example via commands.ownerAllowFrom.
  3. Start or reuse a session with a live sessionEntry and sessionStore.
  4. Send /send off as the non-owner but command-authorized sender.
  5. Confirm the resolved command context has:
    • isAuthorizedSender === true
    • senderIsOwner === false
  6. Observe that the handler still accepts the command, mutates sessionEntry.sendPolicy, and persists the session entry.

Demonstrated Impact
The vulnerable handler performs a real persistent session-state change:

  • src/auto-reply/reply/commands-session.ts:232-238
    • /send inherit deletes sessionEntry.sendPolicy
    • other modes assign sessionEntry.sendPolicy = sendPolicyCommand.mode
    • the handler then calls persistSessionEntry(params)

The mutation is not gated by owner status, only by general command authorization.

That changes subsequent delivery behavior for the current session, which matches the documented meaning of sendPolicy.

Environment

  • Product: OpenClaw
  • Verified shipped tag: v2026.3.23
  • Shipped tag commit: ccfeecb6887cd97937e33a71877ad512741e82b2
  • Published GitHub release time: 2026-03-23T23:15:50Z
  • Verification date: 2026-03-24

Duplicate Check
Upon inspection there is no preexisting GHSA for /send.

This is distinct from:

  • GHSA-r7vr-gr74-94p8
    • that advisory covered owner-only authorization bypasses for /config and /debug, not /send.

This is the same authorization class, but a different privileged command surface that still lacks the owner check.

In Scope Check
This report is in scope under SECURITY.md because:

  • it does not rely on adversarial operators sharing one gateway host or config;
  • it does not rely on trusted local state tampering;
  • SECURITY.md:151-152 explicitly says non-owner sender status matters for owner-only tools and commands;
  • /send is explicitly documented as owner-only, so this is a direct owner-only authorization bypass, not a complaint about normal shared-agent steering.

This is therefore a concrete authorization flaw against a documented product boundary.

Remediation Advice

  1. Change /send to require owner status, not just command authorization.
  2. Reuse the same owner-only rejection pattern already used by privileged command surfaces such as /config, /debug, and owner-only /plugins writes.
  3. Add regression coverage for the exact case where:
    • a non-owner sender is command-authorized;
    • /send must still be rejected unless senderIsOwner === true.
  4. Verify that the owner can still use /send on|off|inherit normally.

Affected versions

npm

PackageVulnerableFixed in
openclaw
< 2026.3.24
2026.3.24

How to fix

Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.

openclaw npm → 2026.3.24

npm
npm install openclaw@2026.3.24
yarn
yarn add openclaw@2026.3.24
pnpm
pnpm add openclaw@2026.3.24

Severity breakdown

CVSS 4.0 0.0

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

Attack vector
Network
Attack complexity
Low
Attack requirements
None
Privileges required
Low
User interaction
None
Confidentiality (vulnerable system)
None
Integrity (vulnerable system)
Low
Availability (vulnerable system)
Low
Confidentiality (subsequent systems)
None
Integrity (subsequent systems)
None
Availability (subsequent systems)
None

CVSS 3.1 5.4

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

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

Weakness

CWE-285: Improper Authorization

The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.

How to prevent it
  • Architecture and Design: Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) to enforce the roles at the appropriate boundaries. Note that this approach may not protect against horizontal authorization, i.e., it will not protect a user from attacking others with the same role.
  • Architecture and Design: Ensure that you perform access control checks related to your business logic. These checks may be different than the access control checks that you apply to more generic resources such as files, connections, processes, memory, and database records. For example, a database may restrict access for medical records to a specific database user, but each record might only be intended to be accessible to the patient and the patient's doctor.
  • Architecture and Design: Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using authorization frameworks such as the JAAS Authorization Framework [REF-233] and the OWASP ESAPI Access Control feature [REF-45].
  • Architecture and Design: For web applications, make sure that the access control mechanism is enforced correctly at the server side on every page. Users should not be able to access any unauthorized functionality or information by simply requesting direct access to that page. One way to do this is to ensure that all pages containing sensitive information are not cached, and that all such pages restrict access to requests that are accompanied by an active and authenticated session token associated with a user who has the required permissions to access that page.
  • System Configuration, Installation: Use the access control capabilities of your operating system and server environment and define your access control lists accordingly. Use a "default deny" policy when defining these ACLs.

CWE-862: Missing Authorization

The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

How to prevent it
  • Architecture and Design: Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) [REF-229] to enforce the roles at the appropriate boundaries. Note that this approach may not protect against horizontal authorization, i.e., it will not protect a user from attacking others with the same role.
  • Architecture and Design: Ensure that access control checks are performed related to the business logic. These checks may be different than the access control checks that are applied to more generic resources such as files, connections, processes, memory, and database records. For example, a database may restrict access for medical records to a specific database user, but each record might only be intended to be accessible to the patient and the patient's doctor [REF-7].
  • Architecture and Design: Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using authorization frameworks such as the JAAS Authorization Framework [REF-233] and the OWASP ESAPI Access Control feature [REF-45].
  • Architecture and Design: For web applications, make sure that the access control mechanism is enforced correctly at the server side on every page. Users should not be able to access any unauthorized functionality or information by simply requesting direct access to that page. One way to do this is to ensure that all pages containing sensitive information are not cached, and that all such pages restrict access to requests that are accompanied by an active and authenticated session token associated with a user who has the required permissions to access that page.
  • System Configuration, Installation: Use the access control capabilities of your operating system and server environment and define your access control lists accordingly. Use a "default deny" policy when defining these ACLs.

References

Timeline

  1. Published
  2. Last updated by the source
  3. Latest EPSS score
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