GitBucket 4.23.1 Unauthenticated Remote Code Execution
Published May 17, 2026
9.3
CRITICALCVSS 4.0
EPSS 0.59%
Description
GitBucket 4.23.1 contains an unauthenticated remote code execution vulnerability that allows attackers to execute arbitrary commands by exploiting weak secret token generation and insecure file upload functionality. Attackers can brute-force the Blowfish encryption key, upload a malicious JAR plugin via the git-lfs endpoint, and execute system commands through an exposed exploit endpoint.
Affected products
-
- Version 4.23.1StatusaffectedConstraints-
- Version
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed May 18, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
May–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.59% (0.00589) | 46.16th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.46% (0.00456) | 35.94th | v5 (v2026.06.15) |
| May 18, 2026 | 0.20% (0.00204) | 42.38th | v4 (v2025.03.14) |
References (4)
- https://github.com/gitbucket/gitbucket product
- https://security.szurek.pl/ productNot ApplicablePress/Media Coverage
- https://www.exploit-db.com/exploits/44668 exploitPatch
- https://www.vulncheck.com/advisories/gitbucket-unauthenticated-remote-code-execution third-party-advisoryThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/gitbucket/gitbucket | product | |
| https://security.szurek.pl/ | productNot ApplicablePress/Media Coverage | |
| https://www.exploit-db.com/exploits/44668 | exploitPatch | |
| https://www.vulncheck.com/advisories/gitbucket-unauthenticated-remote-code-execution | third-party-advisoryThird Party Advisory |
Change history (0)
No recorded changes yet.