CVE-2026-103405 Session Smart Router and Session Smart Conductor: Unsanitized input causes HTTP response splitting
Medium 5.8
Published
Updated
Check this codebase for CVE-2026-103405 and fix it if it is affected.
What it is: CVE-2026-103405 is a medium-severity vulnerability in Juniper Networks Session Smart Conductor, published on 28 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-103405 in the wild and no public exploit code.
Affected product: Juniper Networks Session Smart Conductor. 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-2026-103405/ (Markdown: https://insights.sbomify.com/CVE-2026-103405/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-103405?
CVE-2026-103405 is a medium-severity vulnerability in Juniper Networks Session Smart Conductor, published on 28 Oct 2026.
Official description
An Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerability in the web server in Juniper Networks Session Smart Router and Session Smart Conductor allows an attacker to inject arbitrary HTTP headers via unsanitized request body parameters.
Weakness: CWE-74
Which versions are affected by CVE-2026-103405?
How do I fix CVE-2026-103405?
No fix has been published for CVE-2026-103405 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-103405 being exploited?
There is no known exploitation of CVE-2026-103405 in the wild and no public exploit code.
Sources
Also known as GHSA-4j8j-cj78-prcg.