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01 Record

CVE-2026-16052

Cookie Attribute Injection via Unescaped Semicolons in http.cookies.Morsel

LowPUBLISHEDCNA: PSF
CNA base score2.3 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

02 Description

Cookie Attribute Injection via Unescaped Semicolons in http.cookies.Morsel

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
Not scored by EPSS
EPSS percentile
Not scored by EPSS
NVD base score
2.3 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/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
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-11-12.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-11-12 16:28Z53 MIN AGO
Last updated
2026-11-12 16:28Z53 MIN AGO
Reserved
2026-07-17
Assigning CNA
PSF
Record state
PUBLISHED
Severity
Low (CVSS 2.3)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Weaknesses
  • CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream ComponentClass
Data version
5.2
Document digest
963784b229651f83513c08f9cba2baa54dc2e7a8eb8114a62ddd35ee81c287b9

05 Affected products

VendorProductVersionsPlatforms
Python Software FoundationCPython0 to < 3.16.0—

06 References