CVE-2025-1867 HTTP Response Smuggling Vulnerability in libhv
Critical 10.0
Published
Updated
Check this codebase for CVE-2025-1867 and fix it if it is affected.
What it is: CVE-2025-1867 is a critical vulnerability in ithewei libhv, published on 3 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-2025-1867 in the wild and no public exploit code.
Affected product: ithewei libhv. 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-2025-1867/ (Markdown: https://insights.sbomify.com/CVE-2025-1867/index.md)
Attackers can exploit HTTP response smuggling in libhv 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
- Available
What is CVE-2025-1867?
CVE-2025-1867 is a critical vulnerability in ithewei libhv, published on 3 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in ithewei libhv allows HTTP Response Smuggling.This issue affects libhv: through 1.3.3.
Weakness: CWE-444
Which versions are affected by CVE-2025-1867?
How do I fix CVE-2025-1867?
Apply the vendor's patch.
Is CVE-2025-1867 being exploited?
There is no known exploitation of CVE-2025-1867 in the wild and no public exploit code.
Sources
Also known as GHSA-4qqr-wvpj-rjf9, OESA-2025-2731.