CVE-2025-29904 Other in Ktor
Medium 5.3
Published
Updated
Check this codebase for CVE-2025-29904 and fix it if it is affected.
What it is: CVE-2025-29904 is a medium-severity vulnerability in JetBrains Ktor, published on 12 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-29904 in the wild and no public exploit code.
Affected product: JetBrains Ktor. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2025-29904/ (Markdown: https://insights.sbomify.com/CVE-2025-29904/index.md)
Attackers can exploit HTTP request smuggling in JetBrains Ktor to bypass security controls or access sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-29904?
CVE-2025-29904 is a medium-severity vulnerability in JetBrains Ktor, published on 12 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In JetBrains Ktor before 3.1.1 an HTTP Request Smuggling was possible
Weakness: CWE-444
Which versions are affected by CVE-2025-29904?
It affects 1 product.
Products include Jetbrains Ktor.
How do I fix CVE-2025-29904?
No fix has been published for CVE-2025-29904 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-29904 being exploited?
There is no known exploitation of CVE-2025-29904 in the wild and no public exploit code.
Other vulnerabilities in JetBrains Ktor
Sources
Also known as GHSA-cqw7-466v-f9g6.