CVE-2026-11972
tarfile opened in streaming mode mishandles EOF
CVE-2026-11972 is fixed in 70 products on 3 platforms, first by DEBIAN-CVE-2026-11972, released June 23, 2026. 10 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 3 platforms
CVSS
8.2
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0072
53rd percentile
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Python 3.13 | 3.13.15 | Python 3.13 3.13.15 | Aug 5, 2026 |
| Python 3.14 | 3.14.7 | Python 3.14 3.14.7 | Aug 5, 2026 |
| Linux | |||
| pypy3 · Debian 14 | 8.0.0+dfsg-1 | DEBIAN-CVE-2026-11972 | Jun 23, 2026 |
| python · sles 15.7 | 2.7.18-150000.123.1 | SUSE-SU-2026:3635-1 | Aug 18, 2026 |
| python-base · sles 15.7 | 2.7.18-150000.123.1 | SUSE-SU-2026:3635-1 | Aug 18, 2026 |
| python-unversioned-command · amzn 2023 | 3.9.25-1.amzn2023.0.8 | ALAS2023-2026-1963 | Jul 20, 2026 |
| python3 · amzn 2023 | 3.9.25-1.amzn2023.0.8 | ALAS2023-2026-1963 | Jul 20, 2026 |
| python3 · sles 15.6 | 3.6.15-150300.10.129.1 | SUSE-SU-2026:4754-1 | Nov 7, 2026 |
| python3 · sles 15.7 | 3.6.15-150300.10.129.1 | SUSE-SU-2026:4754-1 | Nov 7, 2026 |
| python3-core · sles 15.6 | 3.6.15-150300.10.129.1 | SUSE-SU-2026:4754-1 | Nov 7, 2026 |
| python3-core · sles 15.7 | 3.6.15-150300.10.129.1 | SUSE-SU-2026:4754-1 | Nov 7, 2026 |
| python3-debug · amzn 2023 | 3.9.25-1.amzn2023.0.8 | ALAS2023-2026-1963 | Jul 20, 2026 |
| python3-devel · amzn 2023 | 3.9.25-1.amzn2023.0.8 | ALAS2023-2026-1963 | Jul 20, 2026 |
| python3-idle · amzn 2023 | 3.9.25-1.amzn2023.0.8 | ALAS2023-2026-1963 | Jul 20, 2026 |
| python3-libs · amzn 2023 | 3.9.25-1.amzn2023.0.8 | ALAS2023-2026-1963 | Jul 20, 2026 |
| python3-test · amzn 2023 | 3.9.25-1.amzn2023.0.8 | ALAS2023-2026-1963 | Jul 20, 2026 |
| python3-tkinter · amzn 2023 | 3.9.25-1.amzn2023.0.8 | ALAS2023-2026-1963 | Jul 20, 2026 |
| python3.11 · amzn 2023 | 3.11.15-1.amzn2023.0.4 | ALAS2023-2026-1953 | Jul 20, 2026 |
| python3.11-debug · amzn 2023 | 3.11.15-1.amzn2023.0.4 | ALAS2023-2026-1953 | Jul 20, 2026 |
| python3.11-debuginfo · amzn 2023 | 3.11.15-1.amzn2023.0.4 | ALAS2023-2026-1953 | Jul 20, 2026 |
| python3.11-debugsource · amzn 2023 | 3.11.15-1.amzn2023.0.4 | ALAS2023-2026-1953 | Jul 20, 2026 |
| python3.11-devel · amzn 2023 | 3.11.15-1.amzn2023.0.4 | ALAS2023-2026-1953 | Jul 20, 2026 |
| python3.11-idle · amzn 2023 | 3.11.15-1.amzn2023.0.4 | ALAS2023-2026-1953 | Jul 20, 2026 |
| python3.11-libs · amzn 2023 | 3.11.15-1.amzn2023.0.4 | ALAS2023-2026-1953 | Jul 20, 2026 |
| python3.11-test · amzn 2023 | 3.11.15-1.amzn2023.0.4 | ALAS2023-2026-1953 | Jul 20, 2026 |
| python3.11-tkinter · amzn 2023 | 3.11.15-1.amzn2023.0.4 | ALAS2023-2026-1953 | Jul 20, 2026 |
| python3.12 · amzn 2023 | 3.12.13-2.amzn2023.0.4 | ALAS2023-2026-1954 | Jul 20, 2026 |
| python3.12-debug · amzn 2023 | 3.12.13-2.amzn2023.0.4 | ALAS2023-2026-1954 | Jul 20, 2026 |
| python3.12-debuginfo · amzn 2023 | 3.12.13-2.amzn2023.0.4 | ALAS2023-2026-1954 | Jul 20, 2026 |
| python3.12-debugsource · amzn 2023 | 3.12.13-2.amzn2023.0.4 | ALAS2023-2026-1954 | Jul 20, 2026 |
| python3.12-devel · amzn 2023 | 3.12.13-2.amzn2023.0.4 | ALAS2023-2026-1954 | Jul 20, 2026 |
| python3.12-idle · amzn 2023 | 3.12.13-2.amzn2023.0.4 | ALAS2023-2026-1954 | Jul 20, 2026 |
| python3.12-libs · amzn 2023 | 3.12.13-2.amzn2023.0.4 | ALAS2023-2026-1954 | Jul 20, 2026 |
| python3.12-test · amzn 2023 | 3.12.13-2.amzn2023.0.4 | ALAS2023-2026-1954 | Jul 20, 2026 |
| python3.12-tkinter · amzn 2023 | 3.12.13-2.amzn2023.0.4 | ALAS2023-2026-1954 | Jul 20, 2026 |
| python3.13 · Debian 13.5 (trixie) | 3.13.5-2+deb13u5 | DEBIAN-CVE-2026-11972 | Jun 23, 2026 |
| python3.13 · amzn 2023 | 3.13.14-1.amzn2023.0.2 | ALAS2023-2026-1964 | Jul 20, 2026 |
| python3.13-debug · amzn 2023 | 3.13.14-1.amzn2023.0.2 | ALAS2023-2026-1964 | Jul 20, 2026 |
| python3.13-debuginfo · amzn 2023 | 3.13.14-1.amzn2023.0.2 | ALAS2023-2026-1964 | Jul 20, 2026 |
| python3.13-debugsource · amzn 2023 | 3.13.14-1.amzn2023.0.2 | ALAS2023-2026-1964 | Jul 20, 2026 |
| python3.13-devel · amzn 2023 | 3.13.14-1.amzn2023.0.2 | ALAS2023-2026-1964 | Jul 20, 2026 |
| python3.13-freethreading · amzn 2023 | 3.13.14-1.amzn2023.0.2 | ALAS2023-2026-1964 | Jul 20, 2026 |
| python3.13-freethreading-debug · amzn 2023 | 3.13.14-1.amzn2023.0.2 | ALAS2023-2026-1964 | Jul 20, 2026 |
| python3.13-idle · amzn 2023 | 3.13.14-1.amzn2023.0.2 | ALAS2023-2026-1964 | Jul 20, 2026 |
| python3.13-libs · amzn 2023 | 3.13.14-1.amzn2023.0.2 | ALAS2023-2026-1964 | Jul 20, 2026 |
| python3.13-test · amzn 2023 | 3.13.14-1.amzn2023.0.2 | ALAS2023-2026-1964 | Jul 20, 2026 |
| python3.13-tkinter · amzn 2023 | 3.13.14-1.amzn2023.0.2 | ALAS2023-2026-1964 | Jul 20, 2026 |
| python3.14 · Debian 14 | 3.14.7-1 | DEBIAN-CVE-2026-11972 | Jun 23, 2026 |
| python3.14 · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.14-debug · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.14-debuginfo · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.14-debugsource · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.14-devel · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.14-freethreading · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.14-freethreading-debug · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.14-freethreading-devel · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.14-freethreading-idle · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.14-freethreading-libs · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.14-freethreading-test · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.14-freethreading-tkinter · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.14-idle · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.14-libs · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.14-test · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.14-tkinter · amzn 2023 | 3.14.6-1.amzn2023.0.2 | ALAS2023-2026-1962 | Jul 20, 2026 |
| python3.9-debuginfo · amzn 2023 | 3.9.25-1.amzn2023.0.8 | ALAS2023-2026-1963 | Jul 20, 2026 |
| python3.9-debugsource · amzn 2023 | 3.9.25-1.amzn2023.0.8 | ALAS2023-2026-1963 | Jul 20, 2026 |
| python311 · sles 15.6 | 3.11.15-150600.3.62.2 | SUSE-SU-2026:3560-1 | Aug 10, 2026 |
| python311 · sles 15.7 | 3.11.15-150600.3.62.2 | SUSE-SU-2026:3560-1 | Aug 10, 2026 |
| python311-core · sles 15.6 | 3.11.15-150600.3.62.2 | SUSE-SU-2026:3560-1 | Aug 10, 2026 |
| python311-core · sles 15.7 | 3.11.15-150600.3.62.2 | SUSE-SU-2026:3560-1 | Aug 10, 2026 |
| python312 · sles 15.6 | 3.12.14-150600.3.68.1 | SUSE-SU-2026:4534-1 | Oct 6, 2026 |
| python312-core · sles 15.6 | 3.12.14-150600.3.68.1 | SUSE-SU-2026:4534-1 | Oct 6, 2026 |
| python313 · opensuse-leap 16.0 | 3.13.14-160000.2.1 | OPENSUSE-SU-2026:21595-1 | Aug 19, 2026 |
| python313 · sles 15.7 | 3.13.14-150700.4.53.1 | SUSE-SU-2026:3649-1 | Aug 19, 2026 |
| python313 · sles 16.0 | 3.13.14-160000.2.1 | SUSE-SU-2026:23303-1 | Aug 19, 2026 |
| python313-core · opensuse-leap 16.0 | 3.13.14-160000.2.1 | OPENSUSE-SU-2026:21595-1 | Aug 19, 2026 |
| python313-core · sles 15.7 | 3.13.14-150700.4.53.1 | SUSE-SU-2026:3649-1 | Aug 19, 2026 |
| python313-core · sles 16.0 | 3.13.14-160000.2.1 | SUSE-SU-2026:23303-1 | Aug 19, 2026 |
| python313-documentation · opensuse-leap 16.0 | 3.13.14-160000.2.1 | OPENSUSE-SU-2026:21595-1 | Aug 19, 2026 |
| python313-documentation · sles 16.0 | 3.13.14-160000.2.1 | SUSE-SU-2026:23303-1 | Aug 19, 2026 |
| python313-nogil · opensuse-leap 16.0 | 3.13.14-160000.2.1 | OPENSUSE-SU-2026:21595-1 | Aug 19, 2026 |
| python313-nogil-nogil-core · opensuse-leap 16.0 | 3.13.14-160000.2.1 | OPENSUSE-SU-2026:21595-1 | Aug 19, 2026 |
| No fix yet | |||
| Python 2 (Windows apps) | No fix yet | no-fix | n/a |
| Python 3.10 (Windows apps) | No fix yet | no-fix | n/a |
| Python 3.11 (Windows apps) | No fix yet | no-fix | n/a |
| Python 3.12 (Windows apps) | No fix yet | no-fix | n/a |
| Python 3.5 (Windows apps) | No fix yet | no-fix | n/a |
| Python 3.6 (Windows apps) | No fix yet | no-fix | n/a |
| Python 3.7 (Windows apps) | No fix yet | no-fix | n/a |
| Python 3.8 (Windows apps) | No fix yet | no-fix | n/a |
| Python 3.9 (Windows apps) | No fix yet | no-fix | n/a |
| Python3 (macOS) | No fix yet | no-fix | n/a |
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