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CVE-2026-12866: Improper Control of Generation of Code

🗓️ 23 Jun 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com👁 9 Views

Code Execution in all expr-eval versions via toJSFunction() using new Function().

Related
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-12866
23 Jun 202605:00
–attackerkb
circl
Circl
CVE-2026-12866
23 Jun 202606:00
–circl
cve
CVE
CVE-2026-12866
23 Jun 202605:00
–cve
cvelist
Cvelist
CVE-2026-12866
23 Jun 202605:00
–cvelist
euvd
EUVD
EUVD-2026-38415
23 Jun 202605:00
–euvd
github
Github Security Blog
expr-eval vulnerable to Code Execution
23 Jun 202606:30
–github
mend
Mend
CVE-2026-12866
23 Jun 202605:00
–mend
nvd
NVD
CVE-2026-12866
23 Jun 202605:17
–nvd
osv_clsa
osv_clsa
CLSA-2026-1792241023 TuxCare security update for expr-eval (1 CVE)
17 Oct 202612:43
–osv_clsa
osv_ghsa
osv_ghsa
GHSA-Q9V2-7M5W-4693 expr-eval vulnerable to Code Execution
23 Jun 202606:30
–osv_ghsa
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12 Aug 2026 00:00Current
6.5Medium risk
Vulners AI Score6.5
CVSS 49.2
CVSS 3.19.8
EPSS0.00866
SSVC
9