CVE-2025-29904
In JetBrains Ktor before 3.1.1 an HTTP Request Smuggling was possible
In JetBrains Ktor before 3.1.1 an HTTP Request Smuggling was possible
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
In JetBrains Ktor before 3.1.1 an HTTP Request Smuggling was possible
- Record
CVE-2025-29904- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-444
- Updated
- 2026-11-02
EUVDEUVD-2025-7894
In JetBrains Ktor before 3.1.1 an HTTP Request Smuggling was possible
- Record
EUVD-2025-7894- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-cqw7-466v-f9g6
In JetBrains Ktor before 3.1.1 an HTTP Request Smuggling was possible
In JetBrains Ktor before 3.1.1 an HTTP Request Smuggling was possible
- Record
GHSA-cqw7-466v-f9g6- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-444
- Updated
- 2026-11-02
NVD
In JetBrains Ktor before 3.1.1 an HTTP Request Smuggling was possible
- Record
CVE-2025-29904- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-444
- Updated
- 2026-11-02
OSV
In JetBrains Ktor before 3.1.1 an HTTP Request Smuggling was possible
- Record
CVE-2025-29904- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-444
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-29904 is a medium vulnerability (CVSS 5.3) in Jetbrains Ktor, published March 12, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 26th percentile. No source names a fixed version.