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CVE-2026-35635

OpenClaw < 2026.3.22 - Webhook Path Route Replacement Vulnerability in Synology Chat

6.3 MediumFix available

OpenClaw before 2026.3.22 contains a webhook path route replacement vulnerability in the Synology Chat extension that allows attackers to collapse multi-account configurations onto shared webhook paths. Attackers can exploit inherited or duplicate webhook paths to bypass per-account DM access control policies and replace route ownership across accounts.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

0.26%Up 0.2 points since Apr 10, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.3

OpenClaw < 2026.3.22 - Webhook Path Route Replacement Vulnerability in Synology Chat

OpenClaw before 2026.3.22 contains a webhook path route replacement vulnerability in the Synology Chat extension that allows attackers to collapse multi-account configurations onto shared webhook paths. Attackers can exploit inherited or duplicate webhook paths to bypass per-account DM access control policies and replace route ownership across accounts.

Record
CVE-2026-35635
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS 3.1
4.8 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-706
Updated
2026-11-02
EUVDEUVD-2026-21126 6.3

OpenClaw before 2026.3.22 contains a webhook path route replacement vulnerability in the Synology Chat extension that allows attackers to collapse multi-account configurations onto shared webhook paths. Attackers can exploit inherited or duplicate webhook paths to bypass per-account DM access control policies and replace route ownership across accounts.

Record
EUVD-2026-21126
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-g8mc-c5f2-mqg7 6.3

Duplicate Advisory: OpenClaw Bypasses DM Policy Separation via Synology Chat Webhook Path Collision

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-rqp8-q22p-5j9q This link is maintained to preserve external references.

Original Description

OpenClaw before 2026.3.22 contains a webhook path route replacement vulnerability in the Synology Chat extension that allows attackers to collapse multi-account configurations onto shared webhook paths. Attackers can exploit inherited or duplicate webhook paths to bypass per-account DM access control policies and replace route ownership across accounts.

Record
GHSA-g8mc-c5f2-mqg7
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/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
4.8 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-706
Updated
2026-11-02
GitHub AdvisoriesGHSA-rqp8-q22p-5j9q 6.9

OpenClaw Bypasses DM Policy Separation via Synology Chat Webhook Path Collision

Summary

Synology Chat multi-account configuration could collapse onto a shared webhook path, replacing route ownership and bypassing per-account DM policy separation.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Affected: < 2026.3.22
  • Fixed: >= 2026.3.22
  • Latest released tag checked: v2026.3.23-2 (630f1479c44f78484dfa21bb407cbe6f171dac87)
  • Latest published npm version checked: 2026.3.23-2

Fix Commit(s)

  • 980940aa58f862da4e19372597bbc2a9f268d70b

Release Status

The fix shipped in v2026.3.22 and remains present in v2026.3.23 and v2026.3.23-2.

Code-Level Confirmation

  • extensions/synology-chat/src/accounts.ts now distinguishes inherited base webhook paths from explicit per-account paths.
  • extensions/synology-chat/src/gateway-runtime.ts now fails closed on inherited or duplicate webhook paths and registers routes without replacement.

OpenClaw thanks @tdjackey for reporting.

Record
GHSA-rqp8-q22p-5j9q
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
Weakness
CWE-285
Updated
2026-11-02
NVD 6.3

OpenClaw before 2026.3.22 contains a webhook path route replacement vulnerability in the Synology Chat extension that allows attackers to collapse multi-account configurations onto shared webhook paths. Attackers can exploit inherited or duplicate webhook paths to bypass per-account DM access control policies and replace route ownership across accounts.

Record
CVE-2026-35635
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/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
4.8 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-706, CWE-863
Updated
2026-11-02
OSV 6.3

OpenClaw < 2026.3.22 - Webhook Path Route Replacement Vulnerability in Synology Chat

OpenClaw before 2026.3.22 contains a webhook path route replacement vulnerability in the Synology Chat extension that allows attackers to collapse multi-account configurations onto shared webhook paths. Attackers can exploit inherited or duplicate webhook paths to bypass per-account DM access control policies and replace route ownership across accounts.

Record
CVE-2026-35635
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Weakness
CWE-706
Updated
2026-11-02
OSVGHSA-g8mc-c5f2-mqg7 6.3

Duplicate Advisory: OpenClaw Bypasses DM Policy Separation via Synology Chat Webhook Path Collision

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-rqp8-q22p-5j9q This link is maintained to preserve external references.

Original Description

OpenClaw before 2026.3.22 contains a webhook path route replacement vulnerability in the Synology Chat extension that allows attackers to collapse multi-account configurations onto shared webhook paths. Attackers can exploit inherited or duplicate webhook paths to bypass per-account DM access control policies and replace route ownership across accounts.

Record
GHSA-g8mc-c5f2-mqg7
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/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
4.8 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-706
Updated
2026-11-02
OSVGHSA-rqp8-q22p-5j9q 6.9

OpenClaw Bypasses DM Policy Separation via Synology Chat Webhook Path Collision

Summary

Synology Chat multi-account configuration could collapse onto a shared webhook path, replacing route ownership and bypassing per-account DM policy separation.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Affected: < 2026.3.22
  • Fixed: >= 2026.3.22
  • Latest released tag checked: v2026.3.23-2 (630f1479c44f78484dfa21bb407cbe6f171dac87)
  • Latest published npm version checked: 2026.3.23-2

Fix Commit(s)

  • 980940aa58f862da4e19372597bbc2a9f268d70b

Release Status

The fix shipped in v2026.3.22 and remains present in v2026.3.23 and v2026.3.23-2.

Code-Level Confirmation

  • extensions/synology-chat/src/accounts.ts now distinguishes inherited base webhook paths from explicit per-account paths.
  • extensions/synology-chat/src/gateway-runtime.ts now fails closed on inherited or duplicate webhook paths and registers routes without replacement.

OpenClaw thanks @tdjackey for reporting.

Record
GHSA-rqp8-q22p-5j9q
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
Weakness
CWE-285
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
openclaw
npm
 before 2026.3.22
2026.3.22

History

History
RecordedChangedSources
affected
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-35635 is a medium vulnerability (CVSS 6.3) in Openclaw, published March 26, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 17th percentile. Fixed in openclaw 2026.3.22.

References

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