CVE-2026-11972

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.

CVSS 4.0

8.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS

0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-25)

CWEs

CWE-252, CWE-606, CWE-770

Published

2026-06-23

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

References

• https://github.com/python/cpython/commit/3f031d431f80668e14f3bc066bbf4369cd9281b9
• https://github.com/python/cpython/commit/4ce6bf7c8aa7725828a38981c306f214c1f29365
• https://github.com/python/cpython/commit/7f0dc59c9a70f8f3b4da33d7c4a2ba552a7acc21
• https://github.com/python/cpython/commit/e86666c9dd256d52d0fbef6feb1ea4a51768fdec
• https://github.com/python/cpython/commit/eb63c0f94dfcbea7fda8eab6213818e134d67192

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