Incomplete Filtering of Special Elements Affecting python-tools package, versions <0:2.7.18-1.amzn2.0.17


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.11% (30th percentile)

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  • Snyk IDSNYK-AMZN2-PYTHONTOOLS-15920199
  • published7 Apr 2026
  • disclosed16 Mar 2026

Introduced: 16 Mar 2026

CVE-2026-3644  (opens in a new tab)
CWE-791  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 python-tools to version 0:2.7.18-1.amzn2.0.17 or higher.
This issue was patched in ALAS2-2026-3218.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-tools package and not the python-tools package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

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 Base Scores

version 3.1