Fortinet FortiOS/Proxy: HTTP Splitting via CRLF (CVE-2025-62826) 7.6-4
CVE-2025-62826 Published on July 14, 2026

An Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability [CWE-113] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4 all versions, FortiOS 7.2 all versions, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4 all versions, FortiProxy 7.2 all versions may allow an attacker able to intercept and modify a user's captive portal authentication request to inject arbitrary headers via crafted HTTP requests.

NVD

Vulnerability Analysis

CVE-2025-62826 is exploitable with network access, requires user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity, and no impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
HIGH
Privileges Required:
NONE
User Interaction:
REQUIRED
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
LOW
Availability Impact:
NONE

Weakness Type

What is a HTTP Response Splitting Vulnerability?

The software receives data from an upstream component, but does not neutralize or incorrectly neutralizes CR and LF characters before the data is included in outgoing HTTP headers.

CVE-2025-62826 has been classified to as a HTTP Response Splitting vulnerability or weakness.


Products Associated with CVE-2025-62826

Want to know whenever a new CVE is published for Fortinet products? stack.watch will email you.

Fortinet Fortipam
 
Fortinet FortiProxy
 
Fortinet FortiOS
 

Affected Versions

Fortinet FortiPAM: Fortinet FortiProxy: Fortinet FortiOS: