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hex/cowlibHTTP Response Splitting via Non-VCHAR Bytes in cow_http_struct_hd:escape_string/2

Risk 30
Severity
6.3
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/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

HTTP Response Splitting via Non-VCHAR Bytes in cowhttpstructhd:escapestring/2

1 / 2
Source: Microsoft
First published (updated )
CVE-2026-43966

hex/cowlibCR Injection in SSE Encoder Enables Event Splitting via cow_sse:event/1

Risk 29
Severity
6.3
CRLF Injection, XSS
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/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

CR Injection in SSE Encoder Enables Event Splitting via cowsse:event/1

1 / 2
Source: Microsoft
First published (updated )
CVE-2026-43968

hex/cowlibUnbounded chunk-size hex digits in cowlib cause quadratic CPU and memory DoS

Risk 33
Severity
8.7
EPSS
0.10%
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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

Unbounded chunk-size hex digits in cowlib cause quadratic CPU and memory DoS

1 / 2
Source: Microsoft
First published (updated )
CVE-2026-7790

hexpm/cowlibCookie Request Header Injection via Unvalidated Encoder in cow_cookie:cookie/1

Risk 18
Severity
2.1
CRLF Injection
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/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

Cookie Request Header Injection via Unvalidated Encoder in cowcookie:cookie/1

1 / 2
Source: Microsoft
First published (updated )
CVE-2026-43969

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