# CVE-2026-58578: LobeHub LobeChat ReDoS in GitHub skill import

Source: https://junglewise.ai/threats/cve-2026-58578-lobehub-lobechat-redos-in-github-skill-import  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-02. Updated: 2026-07-02  
License: CC BY 4.0 with a link back

CVE-2026-58578 · Severity: medium · CVSS 6.5 · Published 2026-07-02

LobeChat, an open-source AI chat framework, is vulnerable to a denial-of-service attack during the "skill import" process. An authenticated user can provide a specially crafted GitHub URL that causes the server to become unresponsive for nearly a minute per request. This can be used to block all other users from accessing the service, leading to significant operational downtime.

Technologies: [LobeHub LobeChat](https://junglewise.ai/threats/technologies/lobechat). Vendors: [LobeHub](https://junglewise.ai/threats/vendors/lobehub).

## Quick answers

**Is CVE-2026-58578 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-58578 being exploited in the wild.

**How severe is CVE-2026-58578?** Medium severity, with a CVSS score of 6.5, published 2 July 2026.

**Which products and versions are affected?** LobeHub LobeChat before 2.2.10-canary.15.

**Is there a fix for CVE-2026-58578?** A patch was published on 2026-07-01: Fix merged into canary branch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-58578 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-58578?** Check whether you run LobeHub LobeChat at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A Regular Expression Denial of Service (ReDoS) vulnerability exists in the `agentSkills.importFromGitHub` tRPC endpoint. The root cause is the `findSkillMd` function in `src/server/services/skill/parser.ts`, which interpolates a user-controlled GitHub URL path segment (`basePath`) directly into a `new RegExp()` constructor without escaping. An authenticated attacker can provide a path containing catastrophic backtracking patterns (e.g., `(a+)+`). When the server processes the repository ZIP, the synchronous `.test()` call against archive entries blocks the Node.js event loop, denying service to all concurrent users. The vulnerability was fixed in version 2.2.10-canary.15 by replacing dynamic regex construction with plain string matching.

## Affected products

- LobeHub LobeChat before 2.2.10-canary.15

## Timeline

- 2026-05-18: disclosed: Initial private disclosure via GitHub Security Advisory
- 2026-06-30: disclosed: Public issue opened on GitHub repository
- 2026-07-01: patched: Fix merged into canary branch
- 2026-07-02: advisory: CVE published to NVD

## References

- [https://github.com/lobehub/lobehub/commit/349bbe326eb8635d6d9c6a96d12702681ae3a84a](https://github.com/lobehub/lobehub/commit/349bbe326eb8635d6d9c6a96d12702681ae3a84a)
- [https://github.com/lobehub/lobehub/issues/16494](https://github.com/lobehub/lobehub/issues/16494)
- [https://github.com/lobehub/lobehub/pull/16548](https://github.com/lobehub/lobehub/pull/16548)
- [https://github.com/lobehub/lobehub/releases/tag/v2.2.10-canary.15](https://github.com/lobehub/lobehub/releases/tag/v2.2.10-canary.15)
- [https://www.vulncheck.com/advisories/lobechat-canary-15-regular-expression-denial-of-service-in-github-skill-import](https://www.vulncheck.com/advisories/lobechat-canary-15-regular-expression-denial-of-service-in-github-skill-import)

## Related threats

- [LobeHub LobeChat webhook signature verification bypass](https://junglewise.ai/threats/cve-2026-85621-lobehub-lobechat-webhook-signature-verification-bypass)
- [LobeChat stored XSS in user avatar upload](https://junglewise.ai/threats/cve-2026-72594-lobechat-stored-xss-in-user-avatar-upload)
- [LobeHub LobeChat broken object level authorization in chat-group agents](https://junglewise.ai/threats/cve-2026-59100-lobehub-lobechat-broken-object-level-authorization-in-chat-group)
- [LobeHub LobeChat broken access control in RAG semantic search](https://junglewise.ai/threats/cve-2026-59098-lobehub-lobechat-broken-access-control-in-rag-semantic-search)
- [LobeHub LobeChat SSRF in skill import and topic cover endpoints](https://junglewise.ai/threats/cve-2026-59095-lobehub-lobechat-ssrf-in-skill-import-and-topic-cover-endpoints)