CVE-2026-62268
borg extract might modify out-of-tree files when extracting maliciously crafted archives
Description
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.
INFO
Published Date :
Nov. 5, 2026, 9:18 p.m.
Last Modified :
Nov. 5, 2026, 9:18 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update borg to version 1.4.5 or newer.
- Consider applying patch commits for older versions.
- Do not share repository access or keys.
- Avoid sharing passphrases for encrypted repos.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-62268.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-62268 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-62268
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-62268 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-62268 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Nov. 05, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 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 Added CWE CWE-59 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/62xxx/CVE-2026-62268.json">CVE-2026-62268</a> Added Reference https://github.com/borgbackup/borg/commit/0ac568e290518c3bbe781459978720dde7fab224 Added Reference https://github.com/borgbackup/borg/commit/141888f2fabcd57a300547c2aa63212cb213924d Added Reference https://github.com/borgbackup/borg/commit/2d632531028b09da8ab5d1450f89bebcc205d640 Added Reference https://github.com/borgbackup/borg/commit/3e9ed6d1ad6d3531b39c07b8ef3ecf41fce4437f Added Reference https://github.com/borgbackup/borg/commit/4f37fdfed10b50559a0dd333b0d5581c642af329 Added Reference https://github.com/borgbackup/borg/commit/d907f2cb57337041c4fa55ca4682895535e5076b Added Reference https://github.com/borgbackup/borg/releases/tag/1.4.5 Added Reference https://github.com/borgbackup/borg/releases/tag/2.0.0b22 Added Reference https://github.com/borgbackup/borg/security/advisories/GHSA-gfp8-w835-v44j