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CVE-2026-49865— Kimai has Server-Side Request Forgery in Invoice PDF Rendering via Markdown Image URLs

Quick assessment

Affected
kimai kimai
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kimai 是一款开源的时间追踪应用程序。2.58.0 之前的版本在发票 PDF 预览和生成流程中存在服务端请求伪造（Server-Side Request Forgery, SSRF）漏洞。如果攻击者能够控制稍后被渲染到发票 PDF 中的 Markdown 内容（例如 ），则服务端的 PDF 渲染器会获取嵌入在 Markdown 图像语法中的远程图像 URL。这使得应用程序服务器在 PDF 渲染过程中会向攻击者控制的或内部目标发出出站请求。该行为可用于内部网络探测、服务端可达性检查，并可能根据部署环境和可访问的内

CVSS 5.3 · Medium EPSS 0.33% · P26

Affected Version Matrix 1

VendorProduct Version RangeStatus
kimai kimai < 2.58.0 affected
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I. Basic Information for CVE-2026-49865

Vulnerability Information
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Vulnerability Title
Kimai has Server-Side Request Forgery in Invoice PDF Rendering via Markdown Image URLs
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
kimai kimai < 2.58.0 -

II. Public POCs for CVE-2026-49865

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III. Intelligence Information for CVE-2026-49865

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Vendor Advisories for CVE-2026-49865 (1)

IV. Related Vulnerabilities

Same product: kimai
Same vendor: kimai
Same weakness: CWE-918

V. Comments for CVE-2026-49865

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