Distribution advisory
This page covers CVE-2026-42246 as tracked by Ubuntu, for the package jruby. The fix is available in version 2.3.1-2~ubuntu16.04.16+esm14; earlier versions remain affected.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability none.
CVSS metrics in full
The score comes from this vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- Attack vector: Network — reachable from anywhere that can route to the service.
- Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
- Privileges required: None — an unauthenticated stranger can try it.
- User interaction: None — nobody has to be tricked into anything.
- Scope: Unchanged — the damage stays inside the vulnerable component.
- Confidentiality impact: High — total loss, or loss the attacker controls.
- Integrity impact: High — total loss, or loss the attacker controls.
- Availability impact: None.
Weakness class
UBUNTU-CVE-2026-42246 is classified as CWE-392: Missing Report of Error Condition. The product encounters an error but does not provide a status code or return value to indicate that an error has occurred.
Affected software
UBUNTU-CVE-2026-42246 is recorded against 7 packages.
- jruby
- ruby2.3 (fixed in 2.3.1-2~ubuntu16.04.16+esm14)
- ruby2.5 (fixed in 2.5.1-1ubuntu1.16+esm8)
- ruby2.7 (fixed in 2.7.0-5ubuntu1.18+esm5)
- ruby3.0 (fixed in 3.0.2-7ubuntu2.13)
- ruby3.2 (fixed in 3.2.3-1ubuntu0.24.04.8)
- ruby3.3 (fixed in 3.3.8-2ubuntu3.1)
Timeline and source
Published on 9 May 2026 and last revised on 6 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)
github.com (Report)
github.com (Report)
github.com (Report)
github.com (Report)
github.com (Report)
github.com (Report)
github.com (Report)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
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-392: Missing Report of Error Condition) in other software:
