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CVE-2026-43899 DeepChat: Incomplete Fix for CVE-2025-55733 leads to Remote Code Execution via Markdown Links bypassing `isValidExternalUrl`

🗓️ 11 May 2026 21:42:54Reported by GitHub_MType 
vulnrichment
 vulnrichment
🔗 github.com👁 13 Views

DeepChat CVE-2026-43899 allows RCE via Markdown links bypassing isValidExternalUrl; fixed in v1.0.4-beta.1.

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Refs
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attackerkb
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11 May 202600:00
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CVE-2026-43899 DeepChat: Incomplete Fix for CVE-2025-55733 leads to Remote Code Execution via Markdown Links bypassing `isValidExternalUrl`
11 May 202621:42
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11 May 202621:42
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CVE-2026-43899
11 May 202623:20
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PT-2026-39859
11 May 202600:00
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CVE-2026-43899
5 Jun 202619:23
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11 May 2026 21:42Current
6Medium risk
Vulners AI Score6
CVSS 3.19.6
EPSS0.0033
SSVC
13