CVE-2026-62268

borg extract might modify out-of-tree files when extracting maliciously crafted archives

publishedCWE-59

borgbackup is an opensource, deduplicating archiver with compression and authenticated encryption. Prior to 1.4.5 and 2.0.0b22, extracting a malicious archive can follow a symlinked parent path or resolve embedded dot-dot path components and delete or overwrite files outside the extraction directory. A crafted slave hardlink can also use an attacker-controlled hardlink source outside the extraction directory and hard-link that file into the restored tree, disclosing its contents. Creating the malicious archive requires repository access and, for encrypted or authenticated repositories, the Borg key and passphrase; a victim must then extract the archive. This issue is fixed in versions 1.4.5 and 2.0.0b22.

Technical severity5.3 mediumCVSS 4.0 · CNA: GitHub_M

Published2026-11-05Source updated 2026-11-09

Collected2026-11-105 attributed sources

Fixes and workarounds

Fix

borgbackup (pip): GitHub reports patched versions 1.4.5. Check the advisory for the affected release branch.

Source: GitHub GHSA-gfp8-w835-v44j

Fix

borgbackup (PyPI): OSV reports a fixed version 1.4.5. Check the advisory for supported release branches.

Source: OSV GHSA-gfp8-w835-v44j

Fix

borgbackup (PyPI): OSV reports a fixed version 2.0.0b22. Check the advisory for supported release branches.

Source: OSV GHSA-gfp8-w835-v44j

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
borg borgbackup	< 1.4.5 (affected) >= 2.0.0b1, < 2.0.0b22 (affected)	CNA: GitHub_M
borgbackup `borgbackup` pip	< 1.4.5 (affected, GitHub advisory range)	GitHub GHSA-gfp8-w835-v44j
borgbackup `borgbackup` PyPI	0.23.0 (affected, PyPI) 0.24.0 (affected, PyPI) 0.25.0 (affected, PyPI) 0.26.0 (affected, PyPI) 0.26.1 (affected, PyPI) 0.27.0 (affected, PyPI) 0.28.0 (affected, PyPI) 0.28.1 (affected, PyPI) 0.28.2 (affected, PyPI) 0.29.0 (affected, PyPI) 0.30.0 (affected, PyPI) 0.30.1 (affected, PyPI) 1.0.0 (affected, PyPI) 1.0.0rc1 (affected, PyPI) 1.0.0rc2 (affected, PyPI) 1.0.1 (affected, PyPI) 1.0.10 (affected, PyPI) 1.0.10rc1 (affected, PyPI) 1.0.11 (affected, PyPI) 1.0.11rc1 (affected, PyPI) 1.0.12 (affected, PyPI) 1.0.13 (affected, PyPI) 1.0.2 (affected, PyPI) 1.0.3 (affected, PyPI) 1.0.4 (affected, PyPI) 1.0.5 (affected, PyPI) 1.0.6 (affected, PyPI) 1.0.6rc1 (affected, PyPI) 1.0.7 (affected, PyPI) 1.0.7rc1 (affected, PyPI) 1.0.7rc2 (affected, PyPI) 1.0.8 (affected, PyPI) 1.0.8rc1 (affected, PyPI) 1.0.9 (affected, PyPI) 1.0.9rc1 (affected, PyPI) 1.1.0 (affected, PyPI) 1.1.0b1 (affected, PyPI) 1.1.0b2 (affected, PyPI) 1.1.0b3 (affected, PyPI) 1.1.0b4 (affected, PyPI) 1.1.0b5 (affected, PyPI) 1.1.0b6 (affected, PyPI) 1.1.0rc1 (affected, PyPI) 1.1.0rc2 (affected, PyPI) 1.1.0rc3 (affected, PyPI) 1.1.0rc4 (affected, PyPI) 1.1.1 (affected, PyPI) 1.1.10 (affected, PyPI) 1.1.11 (affected, PyPI) 1.1.12 (affected, PyPI) 1.1.13 (affected, PyPI) 1.1.14 (affected, PyPI) 1.1.15 (affected, PyPI) 1.1.16 (affected, PyPI) 1.1.17 (affected, PyPI) 1.1.18 (affected, PyPI) 1.1.2 (affected, PyPI) 1.1.3 (affected, PyPI) 1.1.4 (affected, PyPI) 1.1.5 (affected, PyPI) 1.1.6 (affected, PyPI) 1.1.7 (affected, PyPI) 1.1.8 (affected, PyPI) 1.1.9 (affected, PyPI) 1.2.0 (affected, PyPI) 1.2.0a2 (affected, PyPI) 1.2.0a3 (affected, PyPI) 1.2.0a4 (affected, PyPI) 1.2.0a5 (affected, PyPI) 1.2.0a6 (affected, PyPI) 1.2.0a7 (affected, PyPI) 1.2.0a8 (affected, PyPI) 1.2.0a9 (affected, PyPI) 1.2.0b1 (affected, PyPI) 1.2.0b2 (affected, PyPI) 1.2.0b3 (affected, PyPI) 1.2.0b4 (affected, PyPI) 1.2.0rc1 (affected, PyPI) 1.2.1 (affected, PyPI) 1.2.2 (affected, PyPI) 1.2.3 (affected, PyPI) 1.2.4 (affected, PyPI) 1.2.5 (affected, PyPI) 1.2.6 (affected, PyPI) 1.2.7 (affected, PyPI) 1.2.8 (affected, PyPI) 1.2.9 (affected, PyPI) 1.3.0a1 (affected, PyPI) 1.4.0 (affected, PyPI) 1.4.0a1 (affected, PyPI) 1.4.0b1 (affected, PyPI) 1.4.0b2 (affected, PyPI) 1.4.0rc1 (affected, PyPI) 1.4.1 (affected, PyPI) 1.4.2 (affected, PyPI) 1.4.3 (affected, PyPI) 1.4.4 (affected, PyPI) Ecosystem version events: introduced 0; fixed 1.4.5 Source events (ECOSYSTEM) `[ { "introduced": "0" }, { "fixed": "1.4.5" } ]` Other versions: unaffected	OSV GHSA-gfp8-w835-v44j
borgbackup `borgbackup` PyPI	2.0.0b1 (affected, PyPI) 2.0.0b10 (affected, PyPI) 2.0.0b11 (affected, PyPI) 2.0.0b12 (affected, PyPI) 2.0.0b13 (affected, PyPI) 2.0.0b14 (affected, PyPI) 2.0.0b15 (affected, PyPI) 2.0.0b16 (affected, PyPI) 2.0.0b17 (affected, PyPI) 2.0.0b18 (affected, PyPI) 2.0.0b19 (affected, PyPI) 2.0.0b2 (affected, PyPI) 2.0.0b20 (affected, PyPI) 2.0.0b21 (affected, PyPI) 2.0.0b3 (affected, PyPI) 2.0.0b4 (affected, PyPI) 2.0.0b5 (affected, PyPI) 2.0.0b6 (affected, PyPI) 2.0.0b7 (affected, PyPI) 2.0.0b8 (affected, PyPI) 2.0.0b9 (affected, PyPI) Ecosystem version events: introduced 2.0.0b1; fixed 2.0.0b22 Source events (ECOSYSTEM) `[ { "introduced": "2.0.0b1" }, { "fixed": "2.0.0b22" } ]` Other versions: unaffected	OSV GHSA-gfp8-w835-v44j

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
4.0 / 5.3 medium	`CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`	CNA: GitHub_M
4.0 / 5.3 medium	`CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:A/VC:H/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`	NVD: [email protected]

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://github.com/borgbackup/borg/security/advisories/GHSA-gfp8-w835-v44jCNA: GitHub_M · x_refsource_CONFIRM
https://github.com/borgbackup/borg/commit/0ac568e290518c3bbe781459978720dde7fab224CNA: GitHub_M · x_refsource_MISC
https://github.com/borgbackup/borg/commit/141888f2fabcd57a300547c2aa63212cb213924dCNA: GitHub_M · x_refsource_MISC
https://github.com/borgbackup/borg/commit/2d632531028b09da8ab5d1450f89bebcc205d640CNA: GitHub_M · x_refsource_MISC
https://github.com/borgbackup/borg/commit/3e9ed6d1ad6d3531b39c07b8ef3ecf41fce4437fCNA: GitHub_M · x_refsource_MISC
https://github.com/borgbackup/borg/commit/4f37fdfed10b50559a0dd333b0d5581c642af329CNA: GitHub_M · x_refsource_MISC
https://github.com/borgbackup/borg/commit/d907f2cb57337041c4fa55ca4682895535e5076bCNA: GitHub_M · x_refsource_MISC
https://github.com/borgbackup/borg/releases/tag/1.4.5CNA: GitHub_M · x_refsource_MISC
https://github.com/borgbackup/borg/releases/tag/2.0.0b22CNA: GitHub_M · x_refsource_MISC
https://github.com/borgbackup/borg/commit/0ac568e290518c3bbe781459978720dde7fab224[email protected]
https://github.com/borgbackup/borg/commit/141888f2fabcd57a300547c2aa63212cb213924d[email protected]
https://github.com/borgbackup/borg/commit/2d632531028b09da8ab5d1450f89bebcc205d640[email protected]
https://github.com/borgbackup/borg/commit/3e9ed6d1ad6d3531b39c07b8ef3ecf41fce4437f[email protected]
https://github.com/borgbackup/borg/commit/4f37fdfed10b50559a0dd333b0d5581c642af329[email protected]
https://github.com/borgbackup/borg/commit/d907f2cb57337041c4fa55ca4682895535e5076b[email protected]
https://github.com/borgbackup/borg/releases/tag/1.4.5[email protected]
https://github.com/borgbackup/borg/releases/tag/2.0.0b22[email protected]
https://github.com/borgbackup/borg/security/advisories/GHSA-gfp8-w835-v44j[email protected]
https://github.com/borgbackup/borg/security/advisories/GHSA-gfp8-w835-v44jGitHub Security Advisories · advisory
https://github.com/advisories/GHSA-gfp8-w835-v44jOSV / GitHub Security Advisories · advisory
https://osv.dev/vulnerability/GHSA-gfp8-w835-v44jOSV / GitHub Security Advisories · osv

Prioritization

CISA known exploited vulnerabilities

No KEV listing in collected sources. This does not establish that exploitation is absent.

EPSS

0.16% estimated probability of exploitation in the next 30 days; percentile 5.03.
Assessed 2026-11-09 by FIRST.

SSVC

Exploitation: none
Automatable: no
Technical impact: partial

ADP: CISA-ADP · 2026-11-09

Provenance

CNA: GitHub_M
Source updated 2026-11-09
Retrieved 2026-11-09

NVD
Source updated 2026-11-09
Retrieved 2026-11-10

GitHub Security Advisories
Source updated 2026-08-26
Retrieved 2026-11-07

OSV / GitHub Security Advisories
Source updated 2026-10-15
Retrieved 2026-11-05

FIRST EPSS
Source updated Not reported
Retrieved 2026-11-09

Disclosure revision
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