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CVE-2026-22178

OpenClaw < 2026.2.19 - ReDoS and Regex Injection via Unescaped Feishu Mention Metadata

6.9 MediumFix available

OpenClaw versions prior to 2026.2.19 construct RegExp objects directly from unescaped Feishu mention metadata in the stripBotMention function, allowing regex injection and denial of service. Attackers can craft nested-quantifier patterns or metacharacters in mention metadata to trigger catastrophic backtracking, block message processing, or remove unintended content before model processing.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
Low
Availability
Low

Exploit likelihood

0.33%Up 0.3 points since Mar 18, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.9

OpenClaw < 2026.2.19 - ReDoS and Regex Injection via Unescaped Feishu Mention Metadata

OpenClaw versions prior to 2026.2.19 construct RegExp objects directly from unescaped Feishu mention metadata in the stripBotMention function, allowing regex injection and denial of service. Attackers can craft nested-quantifier patterns or metacharacters in mention metadata to trigger catastrophic backtracking, block message processing, or remove unintended content before model processing.

Record
CVE-2026-22178
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Weakness
CWE-1333
Updated
2026-11-02
EUVDEUVD-2026-12722 6.9

OpenClaw versions prior to 2026.2.19 construct RegExp objects directly from unescaped Feishu mention metadata in the stripBotMention function, allowing regex injection and denial of service. Attackers can craft nested-quantifier patterns or metacharacters in mention metadata to trigger catastrophic backtracking, block message processing, or remove unintended content before model processing.

Record
EUVD-2026-12722
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-c6hr-w26q-c636 6.9

OpenClaw has ReDoS and regex injection via unescaped Feishu mention metadata in RegExp construction

Summary

extensions/feishu/src/bot.ts constructed new RegExp() directly from Feishu mention metadata (mention.name, mention.key) in stripBotMention() without escaping regex metacharacters.

Affected Packages / Versions

  • Package: npm openclaw
  • Affected versions: <= 2026.2.17
  • First affected release: 2026.2.6
  • Patched version: 2026.2.19

Impact

  • ReDoS: crafted nested-quantifier patterns in mention metadata can trigger catastrophic backtracking and block message processing.
  • Regex injection: metacharacters in mention metadata can remove unintended message content before it is sent to the model.

Fix Commit(s)

  • 7e67ab75cc2f0e93569d12fecd1411c2961fcc8c
  • 74268489137510b6f6349919d1e197b17290d92c

Thanks @allsmog for reporting.

Record
GHSA-c6hr-w26q-c636
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Weakness
CWE-1333
Updated
2026-11-02
NVD 6.9

OpenClaw versions prior to 2026.2.19 construct RegExp objects directly from unescaped Feishu mention metadata in the stripBotMention function, allowing regex injection and denial of service. Attackers can craft nested-quantifier patterns or metacharacters in mention metadata to trigger catastrophic backtracking, block message processing, or remove unintended content before model processing.

Record
CVE-2026-22178
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/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
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CVSS 3.1
8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Weakness
CWE-1333
Updated
2026-11-02
OSV 6.9

OpenClaw < 2026.2.19 - ReDoS and Regex Injection via Unescaped Feishu Mention Metadata

OpenClaw versions prior to 2026.2.19 construct RegExp objects directly from unescaped Feishu mention metadata in the stripBotMention function, allowing regex injection and denial of service. Attackers can craft nested-quantifier patterns or metacharacters in mention metadata to trigger catastrophic backtracking, block message processing, or remove unintended content before model processing.

Record
CVE-2026-22178
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Weakness
CWE-1333
Updated
2026-11-02
OSVGHSA-c6hr-w26q-c636 6.9

OpenClaw has ReDoS and regex injection via unescaped Feishu mention metadata in RegExp construction

Summary

extensions/feishu/src/bot.ts constructed new RegExp() directly from Feishu mention metadata (mention.name, mention.key) in stripBotMention() without escaping regex metacharacters.

Affected Packages / Versions

  • Package: npm openclaw
  • Affected versions: <= 2026.2.17
  • First affected release: 2026.2.6
  • Patched version: 2026.2.19

Impact

  • ReDoS: crafted nested-quantifier patterns in mention metadata can trigger catastrophic backtracking and block message processing.
  • Regex injection: metacharacters in mention metadata can remove unintended message content before it is sent to the model.

Fix Commit(s)

  • 7e67ab75cc2f0e93569d12fecd1411c2961fcc8c
  • 74268489137510b6f6349919d1e197b17290d92c

Thanks @allsmog for reporting.

Record
GHSA-c6hr-w26q-c636
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Weakness
CWE-1333
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
openclaw
npm
 before 2026.2.19
2026.2.19

History

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

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

In short

CVE-2026-22178 is a medium vulnerability (CVSS 6.9) in Openclaw, published March 2, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 26th percentile. Fixed in openclaw 2026.2.19.

References

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