Improper Validation of Syntactic Correctness of Input Affecting python3-tkinter package, versions <0:3.9.25-1.amzn2023.0.7


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.19% (9th percentile)

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  • Snyk IDSNYK-AMZN2023-PYTHON3TKINTER-17889505
  • published8 Jul 2026
  • disclosed10 Apr 2026

Introduced: 10 Apr 2026

CVE-2026-3446  (opens in a new tab)
CWE-1286  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 python3-tkinter to version 0:3.9.25-1.amzn2023.0.7 or higher.
This issue was patched in ALAS2023-2026-1933.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-tkinter package and not the python3-tkinter package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

When calling base64.b64decode() or related functions the decoding process would stop after encountering the first padded quad regardless of whether there was more information to be processed. This can lead to data being accepted which may be processed differently by other implementations. Use "validate=True" to enable stricter processing of base64 data.

CVSS Base Scores

version 3.1