openSUSE-SU-2026:21221-1 Security update for jline3
Not scored
Published
Check this codebase for openSUSE-SU-2026:21221-1 and fix it if it is affected.
What it is: openSUSE-SU-2026:21221-1 is a denial of service vulnerability in jline3, published on 6 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of openSUSE-SU-2026:21221-1 in the wild and no public exploit code.
Affected product: jline3. 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/openSUSE-SU-2026-21221-1/ (Markdown: https://insights.sbomify.com/openSUSE-SU-2026-21221-1/index.md)
Unauthenticated remote attackers can cause memory exhaustion in jline3 via unbounded Telnet NEW-ENVIRON variables, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is openSUSE-SU-2026:21221-1?
openSUSE-SU-2026:21221-1 is a denial of service vulnerability in jline3, published on 6 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
This update for jline3 fixes the following issues:
Changes in jline3:
- unauthenticated remote memory exhaustion via unbounded Telnet 'NEW-ENVIRON variables (bsc#1269021)
Which versions are affected by openSUSE-SU-2026:21221-1?
Linux distribution packages (1)
jline3 openSUSE:Leap 16.0 | All versions | 3.30.13-160000.3.2 |
How do I fix openSUSE-SU-2026:21221-1?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is openSUSE-SU-2026:21221-1 being exploited?
There is no known exploitation of openSUSE-SU-2026:21221-1 in the wild and no public exploit code.