CVE-2026-63344 Refitter - Code Injection

Refitter < 2.1.2 contains a code injection caused by unescaped content-type keys in OpenAPI descriptions, letting attackers execute arbitrary code via generated assemblies at application startup, exploit requires attacker-controlled OpenAPI input.

CVSS base score 8.6 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.35% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Code Injection
Impact
Remote Code Execution
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/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
Published
30 October 2026
Updated
1 November 2026
Weakness
CWE-94

Vendor fix

Upgrade to version 2.1.2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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