CVE-20XX-?
agent?

CVE-2026-2717

5.5 MEDIUM 0.5% exploit odds No fix listed Denial of service Web app

What it is

The HTTP Headers plugin for WordPress is vulnerable to CRLF Injection in all versions up to, and including, 1.19.2. This is due to insufficient sanitization of custom header name and value fields before writing them to the Apache .htaccess file via `insert_with_markers()`. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary newline characters and additional Apache directives into the .htaccess configuration file via the 'Custom Headers' settings, leading to Apache configuration parse errors and potential site-wide denial of service.

At a glance

Exploitability
Can be exploited over the network with an admin-level account. High risk of service disruption.
Exploit odds
0.5% chance of exploitation in the next 30 days (EPSS).
Fix
No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

  1. PublishedDisclosed publicly on CVE.org and NVD
  2. Last updatedMost recent change to the record

Why it ranks here

Details

Published
Last modified
Exploit probability
0.5% · EPSS, next 30 days
Weakness
CWE-93
Record status
Deferred

Attack profile CVSS 3.1 · 5.5

Attack vector
Network
Complexity
Low
Privileges needed
High
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High
Raw vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-2717.md and follow it. Check whether this project is affected by CVE-2026-2717. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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References

NVD record · CVE.org record