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CVE-2026-79312 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

webpy web.py 0.76 is vulnerable to Session Fixation. The component Session._load() reads session_id directly from the request cookie and loads that session from the store, and _save() writes back under the same session_id; no rotation after authentication, so a fixed session_id keeps the authenticated state.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CNA: CISA-ADPCVSS-B:6.8 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/lichoin/TraceLoom/blob/main/CVEs/CVE-2026-79312.md	[email protected]	AdvisoryTechnical Description
https://github.com/webpy/webpy	[email protected]	Vendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-384	Session Fixation	CISA-ADP

Affected Products

Product	Versions
web.py	0.76
CPE No CPEs found in CPE dictionary for this product. Remediation Upgrade: 0.76moderate effort Workaround:moderate effort After successful authentication or a privilege change, destroy the old session, generate a new session identifier, and migrate the authentication state to the new session. Mitigation:low effort Configure the session cookie's security attributes in full, such as SameSite, HttpOnly, and Secure, to narrow the channel for planting a session identifier from another site.

Product

Versions

web.py

0.76

CPE

No CPEs found in CPE dictionary for this product.

Remediation

Upgrade: 0.76moderate effort
Workaround:moderate effort
After successful authentication or a privilege change, destroy the old session, generate a new session identifier, and migrate the authentication state to the new session.
Mitigation:low effort
Configure the session cookie's security attributes in full, such as SameSite, HttpOnly, and Secure, to narrow the channel for planting a session identifier from another site.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 22, 2026	New CVE Received	[email protected]
Sep 22, 2026	CVE Modified	CISA-ADP