CVE-2026-11972

High

Open

TLP:CLEAR

tarfile opened in streaming mode mishandles EOF

NVD CVE.org

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Description

When using the "tarfile" module with a file opened in "streaming mode" (mode="r|") the tarfile module did not properly handle EOF, making archive parsing take exponentially longer.

Details

CVSS Score: 8.2
EPSS Score ⓘ: 0.45%

36.8th percentile
CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Confidence: 90%
Published: Jun 23, 2026
Last Modified: Aug 13, 2026

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