CVE catalog

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.

[CVE catalog]

Severity: High · CVSS 8.2
Published: Jun 23, 2026, 11:16:49 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.71% · Oct 22, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	pypy3	sid	`8.0.1+dfsg-1`	fixed
Debian	pypy3	forky	`8.0.1+dfsg-1`	fixed
Debian	pypy3	trixie	`7.3.19+dfsg-2`	vulnerable
Debian	pypy3	bookworm	`7.3.11+dfsg-2+deb12u3`	vulnerable
Debian	python3.11	bookworm	`3.11.2-6+deb12u8`	vulnerable
Debian	python3.11	bookworm-security	`3.11.2-6+deb12u9`	vulnerable
Cpe	pypy3	Not reported	Not reported	vulnerable
Cpe	python3.11	Not reported	Not reported	vulnerable
Alpine	python3	3.21	`3.12.14-r0`	fixed
Alpine	python3	3.22	`3.12.14-r0`	fixed
Alpine	python3	3.23	`3.12.14-r0`	fixed
Alpine	python3	3.24	`3.14.7-r0`	fixed
Opensuse	python314	tumbleweed	`3.14.7-1.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	pypy3	source	sid	`8.0.0+dfsg-1`	not yet assigned	Not reported	[1141534]
Debian	pypy3	source	forky	`8.0.0+dfsg-1`	not yet assigned	Not reported	[1141534]
Debian	pypy3	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1141534]
Debian	pypy3	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1141534]
Debian	python3.11	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Alpine	python3	apk	3.21	`3.12.14-r0`	Not reported	ALPINE-CVE-2026-11972	Not reported
Alpine	python3	apk	3.22	`3.12.14-r0`	Not reported	ALPINE-CVE-2026-11972	Not reported
Alpine	python3	apk	3.23	`3.12.14-r0`	Not reported	ALPINE-CVE-2026-11972	Not reported
Alpine	python3	apk	3.24	`3.14.7-r0`	Not reported	ALPINE-CVE-2026-11972	Not reported
Opensuse	python314	rpm	tumbleweed	`3.14.7-1.1`	Not reported	OPENSUSE-SU-2026:11597-1	Not reported

[Debian bug #1141534]

Notes

[trixie] pypy3: Minor issue [bookworm] pypy3: Minor issue; CPU DoS in tarfile._Stream.seek() looping over attacker-declared block count past EOF, needs a crafted archive opened in streaming mode [bookworm] python3.11: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[idle-python3.11]Affected
Source package: [python3.11]
Details (4)
- 3.11.2-6+deb12u8 · all · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u8 · all · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · all · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · all · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
[libpython3.11]Affected
Source package: [python3.11]
Details (4)
- 3.11.2-6+deb12u8 · amd64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u8 · arm64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · amd64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · arm64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
[libpython3.11-dbg]Affected
Source package: [python3.11]
Details (4)
- 3.11.2-6+deb12u8 · amd64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u8 · arm64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · amd64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · arm64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
[libpython3.11-dev]Affected
Source package: [python3.11]
Details (4)
- 3.11.2-6+deb12u8 · amd64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u8 · arm64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · amd64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · arm64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
[libpython3.11-minimal]Affected
Source package: [python3.11]
Details (4)
- 3.11.2-6+deb12u8 · amd64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u8 · arm64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · amd64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · arm64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
[libpython3.11-stdlib]Affected
Source package: [python3.11]
Details (4)
- 3.11.2-6+deb12u8 · amd64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u8 · arm64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · amd64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · arm64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
[libpython3.11-testsuite]Affected
Source package: [python3.11]
Details (4)
- 3.11.2-6+deb12u8 · all · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u8 · all · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · all · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · all · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
[pypy3]Affected
Details (2)
- 7.3.11+dfsg-2+deb12u3 · amd64 · bookworm
  Affected
  nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
- 7.3.11+dfsg-2+deb12u3 · arm64 · bookworm
  Affected
  nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
[pypy3-dev]Affected
Source package: [pypy3]
Details (2)
- 7.3.11+dfsg-2+deb12u3 · all · bookworm
  Affected
  nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
- 7.3.11+dfsg-2+deb12u3 · all · bookworm
  Affected
  nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
[pypy3-doc]Affected
Source package: [pypy3]
Details (2)
- 7.3.11+dfsg-2+deb12u3 · all · bookworm
  Affected
  nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
- 7.3.11+dfsg-2+deb12u3 · all · bookworm
  Affected
  nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
[pypy3-lib]Affected
Source package: [pypy3]
Details (2)
- 7.3.11+dfsg-2+deb12u3 · amd64 · bookworm
  Affected
  nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
- 7.3.11+dfsg-2+deb12u3 · arm64 · bookworm
  Affected
  nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
[pypy3-lib-testsuite]Affected
Source package: [pypy3]
Details (2)
- 7.3.11+dfsg-2+deb12u3 · all · bookworm
  Affected
  nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
- 7.3.11+dfsg-2+deb12u3 · all · bookworm
  Affected
  nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
[pypy3-tk]Affected
Source package: [pypy3]
Details (2)
- 7.3.11+dfsg-2+deb12u3 · amd64 · bookworm
  Affected
  nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
- 7.3.11+dfsg-2+deb12u3 · arm64 · bookworm
  Affected
  nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
[pypy3-venv]Affected
Source package: [pypy3]
Details (2)
- 7.3.11+dfsg-2+deb12u3 · all · bookworm
  Affected
  nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
- 7.3.11+dfsg-2+deb12u3 · all · bookworm
  Affected
  nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
[python3.11]Affected
Details (4)
- 3.11.2-6+deb12u8 · amd64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u8 · arm64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · amd64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · arm64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
[python3.11-dbg]Affected
Source package: [python3.11]
Details (4)
- 3.11.2-6+deb12u8 · amd64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u8 · arm64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · amd64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · arm64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
[python3.11-dev]Affected
Source package: [python3.11]
Details (4)
- 3.11.2-6+deb12u8 · amd64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u8 · arm64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · amd64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · arm64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
[python3.11-doc]Affected
Source package: [python3.11]
Details (4)
- 3.11.2-6+deb12u8 · all · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u8 · all · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · all · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · all · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
[python3.11-examples]Affected
Source package: [python3.11]
Details (4)
- 3.11.2-6+deb12u8 · all · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u8 · all · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · all · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · all · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
[python3.11-full]Affected
Source package: [python3.11]
Details (4)
- 3.11.2-6+deb12u8 · amd64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u8 · arm64 · bookworm
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · amd64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- 3.11.2-6+deb12u3 · arm64 · bookworm-security
  Affected
  nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12

Next results

Observed: Oct 23, 2026, 9:45:32 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]