CVE-2026-3644
â ī¸ highSummary
The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output().
CVSS Score
7.5
High
EPSS Score
0.1
Exploit Probability
Published Date
2026-03-16
First Seen: 2026-03-17
đ Relative Risk Intelligence
This CVE is Moderate Risk - more severe than 68.9% of all 329,456 vulnerabilities in our database.
#102,448
Above average severity
Severity Percentile
đ¯ CISA SSVC Assessment Updated: Mar 16, 2026
đ Exploitation Status
None
No known exploits
âī¸ Automatable
NO
Requires human interaction
đĨ Technical Impact
Partial
Limited system impact
đ Discovered By
Stan Ulbrych (coordinator)
Stan Ulbrych (remediation developer)
Victor Stinner (remediation reviewer)
Seth Larson (remediation reviewer)
Vyom Yadav (reporter)
SSVC data provided by
CISA
Last Modified
2026-06-04
Source
NVD đ
CVSS Vector 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS Vector 4.0
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/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