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← Actionable
Medium, CVSS 6.9amended

tar filter allows writing outside destination via empty-named symlink

CVE-2026-114583

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (python-min 3.15.2, 3.14.10, 3.13.18, 3.12.16, 3.11.18; libpython 3.15.2, 3.14.10, 3.13.18, 3.12.16, 3.11.18; python 3.15.2, 3.14.10, 3.13.18, 3.12.16, 3.11.18), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Bitnami python-min

    Affected
    < 3.11.18>= 3.12.0, < 3.12.16>= 3.13.0, < 3.13.18>= 3.14.0, < 3.14.10>= 3.15.0, < 3.15.2
    Fixed in
    3.13.18, 3.15.2, 3.11.18, 3.14.10, 3.12.16

  • Bitnami libpython

    Affected
    < 3.11.18>= 3.12.0, < 3.12.16>= 3.13.0, < 3.13.18>= 3.14.0, < 3.14.10>= 3.15.0, < 3.15.2
    Fixed in
    3.13.18, 3.15.2, 3.11.18, 3.14.10, 3.12.16

  • Bitnami python

    Affected
    < 3.11.18>= 3.12.0, < 3.12.16>= 3.13.0, < 3.13.18>= 3.14.0, < 3.14.10>= 3.15.0, < 3.15.2
    Fixed in
    3.13.18, 3.15.2, 3.11.18, 3.14.10, 3.12.16

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
6.9 · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X · score source
EPSS
  • CVE-2026-114583: 0.26% estimated exploitation activity in the next 30 days; percentile 17.99 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

tarfile.tar_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() with filter="tar" to write files outside the destination directory, subject to the permissions of the extracting process. This is the tarfile.tar_filter counterpart of CVE-2026-7774, which covered tarfile.data_filter.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 6 · amended ·

    Amended from osv record BIT-libpython-2026-114583

  2. Revision 5 · amended ·

    Amended from osv record BIT-python-2026-114583

  3. Revision 4 · amended ·

    Amended from osv record BIT-python-min-2026-114583

  4. Revision 3 · amended ·

    Amended from osv record BIT-python-min-2026-114583

  5. Revision 2 · amended ·

    Amended from osv record BIT-python-2026-114583

  6. Revision 1 · created ·

    Published from osv record BIT-libpython-2026-114583

Agent brief

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# Patch Next advisory brief: CVE-2026-114583

Advisory: tar filter allows writing outside destination via empty-named symlink
IDs: CVE-2026-114583
Record: https://patchnext.com/advisories/cve-2026-114583 (revision 6, source checked 31 Oct 2026, 07:05 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: python-min 3.15.2, 3.14.10, 3.13.18, 3.12.16, 3.11.18; libpython 3.15.2, 3.14.10, 3.13.18, 3.12.16, 3.11.18; python 3.15.2, 3.14.10, 3.13.18, 3.12.16, 3.11.18. A vendor fix does not mean a deployment is fixed.

## Affected components
- Bitnami python-min: affected < 3.11.18; >= 3.12.0, < 3.12.16; >= 3.13.0, < 3.13.18; >= 3.14.0, < 3.14.10; >= 3.15.0, < 3.15.2; fixed in 3.13.18, 3.15.2, 3.11.18, 3.14.10, 3.12.16
- Bitnami libpython: affected < 3.11.18; >= 3.12.0, < 3.12.16; >= 3.13.0, < 3.13.18; >= 3.14.0, < 3.14.10; >= 3.15.0, < 3.15.2; fixed in 3.13.18, 3.15.2, 3.11.18, 3.14.10, 3.12.16
- Bitnami python: affected < 3.11.18; >= 3.12.0, < 3.12.16; >= 3.13.0, < 3.13.18; >= 3.14.0, < 3.14.10; >= 3.15.0, < 3.15.2; fixed in 3.13.18, 3.15.2, 3.11.18, 3.14.10, 3.12.16

## Suggested inspection (read-only)
- Bitnami python-min: check the installed version with your package manager.
- Bitnami libpython: check the installed version with your package manager.
- Bitnami python: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on python-min, libpython, python.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/BIT-libpython-2026-114583 (OSV record BIT-libpython-2026-114583 lists affected ranges: Bitnami libpython >=0 =3.12.0 =3.13.0 =3.14.0 =3.15.0 =3.16.0)
- Verified: https://osv.dev/vulnerability/BIT-python-2026-114583 (OSV record BIT-python-2026-114583 lists affected ranges: Bitnami python >=0 =3.12.0 =3.13.0 =3.14.0 =3.15.0 =3.16.0)
- Verified: https://osv.dev/vulnerability/BIT-python-min-2026-114583 (OSV record BIT-python-min-2026-114583 lists affected ranges: Bitnami python-min >=0 =3.12.0 =3.13.0 =3.14.0 =3.15.0 =3.16.0)
- Verified: https://osv.dev/vulnerability/BIT-python-min-2026-114583 (OSV record BIT-python-min-2026-114583 lists affected ranges: Bitnami python-min >=0 =3.12.0 =3.13.0 =3.14.0 =3.15.0 <3.15.2 (fixed))
- Verified: https://osv.dev/vulnerability/BIT-python-2026-114583 (OSV record BIT-python-2026-114583 lists affected ranges: Bitnami python >=0 =3.12.0 =3.13.0 =3.14.0 =3.15.0 <3.15.2 (fixed))
- Verified: https://osv.dev/vulnerability/BIT-libpython-2026-114583 (OSV record BIT-libpython-2026-114583 lists affected ranges: Bitnami libpython >=0 =3.12.0 =3.13.0 =3.14.0 =3.15.0 <3.15.2 (fixed))

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