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CVE-2026-40087 LangChain has incomplete f-string validation in prompt templates

🗓️ 09 Apr 2026 19:34:55Reported by GoogleType 
osv
 osv🔗 osv.dev👁 2 Views

CVE-2026-40087 fixes f-string validation gaps in LangChain prompt templates.

Related
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: Investigation Assistant App for IBM QRadar SIEM is vulnerable to using components with known vulnerabilities
5 May 202614:43
–ibm
IBM Security Bulletins		Security Bulletin: IBM App Connect Enterprise Certified Container DesignerAuthoring and Dashboard operands are vulnerable to loss of confidentiality (CVE-2026-39892, CVE-2026-34073) and arbitrary code execution (CVE-2026-40087)
7 May 202613:33
–ibm
IBM Security Bulletins		Security Bulletin: Multiple vulnerabilities in IBM MQ Agent images
18 May 202616:50
–ibm
IBM Security Bulletins		Security Bulletin: IBM Watson Speech Services Cartridge is vulnerable to incomplete validation in LangChain [CVE-2026-40087]
22 Jun 202621:35
–ibm
ATTACKERKB		CVE-2026-40087
9 Apr 202619:34
–attackerkb
Chainguard		CVE-2026-40087 vulnerabilities
11 Apr 202614:18
–cgr
CNNVD		LangChain 安全漏洞
9 Apr 202600:00
–cnnvd
CVE		CVE-2026-40087
9 Apr 202619:34
–cve
Cvelist		CVE-2026-40087 LangChain has incomplete f-string validation in prompt templates
9 Apr 202619:34
–cvelist
EUVD		EUVD-2026-21063
9 Apr 202619:34
–euvd
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15 Jul 2026 01:49Current
6Medium risk
Vulners AI Score6
CVSS 3.15.3
EPSS0.00262
vulnerability 2026 40087f string validationlangchain promptsprompt templates
2