Kimai has Server-Side Request Forgery in Invoice PDF Rendering via Markdown Image URLs
Published Sep 11, 2026
5.3
MEDIUMCVSS 4.0
EPSS 0.35%
Description
Kimai is an open-source time tracking application. Versions prior to 2.58.0 contain a server-side request forgery vulnerability in their invoice PDF preview and generation workflow. If an attacker can control Markdown content that is later rendered into an invoice PDF, such as `Customer.invoiceText`, the server-side PDF renderer will fetch remote image URLs embedded in Markdown image syntax. This allows the application server to issue outbound requests to attacker-controlled or internal targets during PDF rendering. The behavior can be used for internal network probing, server-side reachability checks, and potentially follow-on exploitation depending on deployment environment and accessible internal services. Version 2.58.0 patches the issue.
Affected products
-
- Version < 2.58.0StatusaffectedConstraints-
- Version
No data.
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:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/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
No CVSS v3.1 score for this CVE.
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
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Sep 14, 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
Sep–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.35% (0.00351) | 26.32th | v5 (v2026.06.15) |
| Sep 12, 2026 | 0.33% (0.00327) | 25.65th | v5 (v2026.06.15) |
References (2)
- https://github.com/advisories/GHSA-pj8j-p4g4-4vw8 Advisory
- https://github.com/kimai/kimai/security/advisories/GHSA-pj8j-p4g4-4vw8 x_refsource_CONFIRM
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-pj8j-p4g4-4vw8 | Advisory | |
| https://github.com/kimai/kimai/security/advisories/GHSA-pj8j-p4g4-4vw8 | x_refsource_CONFIRM |
Change history (0)
No recorded changes yet.