Low [CVE-2025-62826] Header injection in captive portal authentication form
This low-severity Fortinet advisory covers CVE-2025-62826 affecting FortiOS, FortiProxy.
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Summary
CVSSv3 Score:
3.1
An Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability [CWE-113] in FortiOS and FortiProxy captive portal may allow an attacker able to intercept and modify a user's authentication request to inject arbitrary headers via crafted HTTP requests.
Revised on 2026-07-14 00:00:00
- FortiOS 7.6: 7.6.0 through 7.6.4
- FortiOS 7.4: 7.4 all versions
- FortiOS 7.2: 7.2 all versions
- FortiProxy 7.6: 7.6.0 through 7.6.4
- FortiProxy 7.4: 7.4 all versions
- FortiProxy 7.2: 7.2 all versions
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
- FortiOS 7.6: 7.6.5
- FortiOS 7.4: migrate to a fixed release
- FortiOS 7.2: migrate to a fixed release
- FortiProxy 7.6: 7.6.5
- FortiProxy 7.4: migrate to a fixed release
- FortiProxy 7.2: migrate to a fixed release
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
Mitigation checklist
- Upgrade per the Affected/Solution table: FortiOS 7.6: 7.6.5; FortiOS 7.4: migrate to a fixed release; FortiOS 7.2: migrate to a fixed release; FortiProxy 7.6: 7.6.5; FortiProxy 7.4: migrate to a fixed release; ….
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
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