CVE-2026-27830
c3p0 vulnerable to Remote Code Execution via unsafe deserialization of userOverridesAsString property
02 Description
c3p0 vulnerable to Remote Code Execution via unsafe deserialization of userOverridesAsString property
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.59% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 48.1% of scored records. A rank, not a probability.
- NVD base score
- 8.9 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- NVD analysis status
- Deferred. NVD last modified this record on 2026-09-14.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-02-26 00:45Z8 MO AGO
- Last updated
- 2026-09-15 12:04Z1 MO AGO
- Reserved
- 2026-02-24
- Assigning CNA
- GitHub_M
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.9)
- CNA CVSS vector
- CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
- Weaknesses
- Data version
- 5.2
- Document digest
- 58cb4118ada10402a2bffaeb75ecc421a2971d454ae9f15dd548f40aa189b2eb
05 Affected products
06 References
- github.comhttps://github.com/swaldman/c3p0/security/advisories/GHSA-5476-xc4j-rqcv
- github.comhttps://github.com/swaldman/c3p0/commit/e14cbd8166e423e2e9a9d6f08b2add3433492d6e
- mogwailabs.dehttps://mogwailabs.de/en/blog/2025/02/c3p0-you-little-rascal
- www.mchange.comhttps://www.mchange.com/projects/c3p0/#configuring_security
- www.mchange.comhttps://www.mchange.com/projects/c3p0/#security-note
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-27830
- bugzilla.redhat.comRHBZ#2442908https://bugzilla.redhat.com/show_bug.cgi?id=2442908
- security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27830.json
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:18054
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:18055
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:28385
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4285
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:18059
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:3890
07 Fixed in
Debian 12
- c3p0 No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- c3p0 No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- c3p0 No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- c3p0 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- c3p0 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- c3p0 Fixed in 0.9.1.2-9+deb8u1ubuntu0.16.04.1~esm2Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- c3p0 Fixed in 0.9.1.2-9+deb8u1ubuntu0.18.04.1+esm1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- c3p0 Fixed in 0.9.1.2-10ubuntu0.20.04.1+esm1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 22.04 LTS
- c3p0 Fixed in 0.9.1.2-10ubuntu1+esm1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 24.04 LTS
- c3p0 Fixed in 0.9.1.2-10ubuntu2+esm1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 26.04 LTS
- c3p0 Fixed in 0.9.1.2-11ubuntu0.1~esm1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.