CVE-2026-49378 Information disclosure in TeamCity
Medium 4.3
Published
Updated
Check this codebase for CVE-2026-49378 and fix it if it is affected.
What it is: CVE-2026-49378 is a medium-severity vulnerability in Jetbrains Teamcity, published on 29 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-49378 in the wild and no public exploit code.
Affected product: Jetbrains Teamcity. 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-2026-49378/ (Markdown: https://insights.sbomify.com/CVE-2026-49378/index.md)
Attackers can expose credentials via parameter autocompletion in JetBrains TeamCity, requiring an upgrade to secure sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-49378?
CVE-2026-49378 is a medium-severity vulnerability in Jetbrains Teamcity, published on 29 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In JetBrains TeamCity before 2026.1 credentials parameters were exposed via parameter autocompletion
Weakness: CWE-862
Which versions are affected by CVE-2026-49378?
It affects 1 product.
Products include Jetbrains Teamcity.
How do I fix CVE-2026-49378?
No fix has been published for CVE-2026-49378 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-49378 being exploited?
There is no known exploitation of CVE-2026-49378 in the wild and no public exploit code.
Other vulnerabilities in Jetbrains Teamcity
Sources
Also known as GHSA-pg2h-77h8-9m6v.