Detections
Analytics

SCA: security update for flask (GHSA-68rp-wp8r-4726)

low Tenable Self-Hosted Container Security Plugin ID 437883

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Flask is a web server gateway interface (WSGI) web application framework. In versions 3.1.2 and below,
 when the session object is accessed, Flask should set the Vary: Cookie header., resulting in a Use of
 Cache Containing Sensitive Information vulnerability. The logic instructs caches not to cache the
 response, as it may contain information specific to a logged in user. This is handled in most cases, but
 some forms of access such as the Python in operator were overlooked. The severity and risk depend on the
 application being hosted behind a caching proxy that doesn't ignore responses with cookies, not setting a
 Cache-Control header to mark pages as private or non-cacheable, and accessing the session in a way that
 only touches keys without reading values or mutating the session. The issue has been fixed in version
 3.1.3. (CVE-2026-27205)

See Also

https://github.com/advisories/GHSA-68rp-wp8r-4726

Plugin Details

Severity: Low

ID: 437883

Version: Revision 1.12

Type: Local

Family: SCA Checks

Published: 2/20/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Low

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2026-27205

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Low

Base Score: 2.3

Threat Score: 0.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 2/19/2026

Vulnerability Publication Date: 2/19/2026

Reference Information

CVE: CVE-2026-27205

cwe: CWE-524