Quick answers
- Is CVE-2026-35589 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-35589 being exploited in the wild.
- How severe is CVE-2026-35589?
- High severity, with a CVSS score of 8, published 14 April 2026.
- Which products and versions are affected?
- HKUDS Nanobot < 0.1.5.
- Is there a fix for CVE-2026-35589?
- A patch was published on 2026-04-06: Version 0.1.5 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-35589 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-35589?
- Check whether you run HKUDS Nanobot 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 Cross-Site WebSocket Hijacking (CSWSH) vulnerability exists in the nanobot bridge's WebSocket server (bridge/src/server.ts). While a previous fix (CVE-2026-2577) restricted the server to localhost, it failed to implement Origin header validation or enable mandatory authentication by default. Because browsers do not apply the Same-Origin Policy to WebSockets, a malicious website visited by a user can initiate a connection to ws://127.0.0.1:3001/. An attacker can then interact with the bridge API to intercept messages, steal authentication QR codes, or send messages. The issue is fixed in version 0.1.5 by improving authentication and connection handling.
Affected products
- HKUDS nanobot < 0.1.5
Timeline
- 2026-04-06: patched: Version 0.1.5 released
- 2026-04-14: advisory: GitHub Security Advisory published
- 2026-04-14: disclosed: CVE-2026-35589 assigned