FortiOS
CVE-2025-62826: HTTP response splitting in FortiPAM, FortiProxy and others
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.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| FortiPAM 1.7 | See the advisory |
| FortiPAM 1.6.0 to 1.6.2 | Upgrade past 1.6.2; see the advisory |
| FortiPAM 1.5.0 to 1.5.1 | Upgrade past 1.5.1; see the advisory |
| FortiPAM 1.4.0 to 1.4.3 | Upgrade past 1.4.3; see the advisory |
| FortiPAM 1.3.0 to 1.3.1 | Upgrade past 1.3.1; see the advisory |
| FortiPAM 1.2 | See the advisory |
| FortiPAM 1.1.0 to 1.1.2 | Upgrade past 1.1.2; see the advisory |
| FortiPAM 1.0.0 to 1.0.3 | Upgrade past 1.0.3; see the advisory |
| FortiProxy 7.6.0 to 7.6.4 | 7.6.5 or later |
| FortiProxy 7.4.0 to 7.4.14 | Upgrade past 7.4.14; see the advisory |
| FortiProxy 7.2.0 to 7.2.16 | Upgrade past 7.2.16; see the advisory |
| FortiProxy 7.0.0 to 7.0.23 | Upgrade past 7.0.23; see the advisory |
| FortiOS 7.6.0 to 7.6.2 | 7.6.5 or later |
| FortiOS 7.4.0 to 7.4.8 | Upgrade past 7.4.8; see the advisory |
| FortiOS 7.2.0 to 7.2.13 | Upgrade past 7.2.13; see the advisory |
| FortiOS 7.0.0 to 7.0.19 | Upgrade past 7.0.19; see the advisory |
| FortiOS 6.4.0 to 6.4.16 | Upgrade past 6.4.16; see the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 10 Oct 2026.