Distribution advisory
This page covers CVE-2026-47240 as tracked by Ubuntu, for the package jruby. No fixed version has been recorded for this distribution yet.
How this vulnerability can be exploited
This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. Rated impact: confidentiality none, integrity high, availability low.
CVSS metrics in full
The score comes from this vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
- Attack vector: Local — a local account, shell or session on the host is needed.
- Attack complexity: Low — the attack works reliably, with no preparation.
- Attack requirements: Present — the target has to be in a particular state for the attack to work.
- Privileges required: None — an unauthenticated stranger can try it.
- User interaction: Passive — a victim action is involved, but not a deliberate one.
- Confidentiality impact: None.
- Integrity impact: High — total loss, or loss the attacker controls.
- Availability impact: Low — limited, and the attacker does not choose what is affected.
Weakness class
UBUNTU-CVE-2026-47240 is classified as CWE-77: Command Injection. User input is placed into a command that the system interprets, allowing extra commands to be appended to the intended one.
Affected software
UBUNTU-CVE-2026-47240 is recorded against 7 packages.
- jruby
- ruby2.3
- ruby2.5
- ruby2.7
- ruby3.0
- ruby3.2
- ruby3.3
Timeline and source
Published on 22 June 2026 and last revised on 16 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
ubuntu.com (Report)
www.cve.org (Report)
github.com (Report)
Other advisories for this package
jruby has other advisories on record. If you are patching this one, these are worth checking on the same host:
Same weakness in other software
These advisories are the same class of weakness (CWE-77: Command Injection) in other software:
