CVE-2026-0672CWE-93

Header injection in http.cookies.Morsel

Medium · published January 20, 2026

CVSS v4.0
6.0
EPSS
0%
Percentile
40.4
In the wild
Unconfirmed
What it is

When using http.cookies.Morsel, user-controlled cookie values and parameters can allow injecting HTTP headers into messages. Patch rejects all control characters within cookie names, values, and parameters.

The record
Technical detail
CVSS v4.0
6.0 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00480 · 40.4th percentile
Weakness
CWE-93 · Improper Neutralization of CRLF Sequences ('CRLF Injection')
Published
2026-01-20T21:52Z
EPSS history
Timeline
  • 20 JAN 21:52Z
    Header injection in http.cookies.Morsel
    cvelistv5