CVE-2026-85526
Last modified
CVE-2026-85526 is a critical-severity vulnerability rated 9.9/10 on the CVSS scale. Path traversal in the Btrfs storage driver (unpackVolume) in Canonical LXD on Linux allows an authenticated user with instance creation privileges to delete or replace arbitrary files and directories on the host filesystem as root via a crafted subvolumes[].path entry in backup/optimized_header.yaml during a btrfs optimized backup import..
Description
Path traversal in the Btrfs storage driver (unpackVolume) in Canonical LXD on Linux allows an authenticated user with instance creation privileges to delete or replace arbitrary files and directories on the host filesystem as root via a crafted subvolumes[].path entry in backup/optimized_header.yaml during a btrfs optimized backup import.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Canonical | LXD | >= 4.0.0, < 4.0.14; >= 5.0.0, < 5.0.10; >= 5.21.0, < 5.21.8; >= 6.0, < 6.10 |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-85526?
How severe is CVE-2026-85526?
How do I fix CVE-2026-85526?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-85518A flaw was found in OpenSCAP. When decomposing a Source Data…6.1
- CVE-2026-8552Heap buffer overflow in GPU in Google Chrome on Android prio…4.3
- CVE-2026-85520Google Merchant Center Feed (gmfeed) module for PrestaShop i…9.3
- CVE-2026-85522A vulnerability was detected in valkey-io valkey up to 9.5.4…5.3
- CVE-2026-85523Improper neutralization of special elements used in an OS co…8.8
- CVE-2026-85525Improper OCSP response validation in the Snowflake Python, G…7.4
- CVE-2026-85528Improper input validation of the auto-configuration account …5.3
- CVE-2026-85529GitLab has remediated an issue in GitLab CE/EE affecting all…5.3
- CVE-2026-8553Use after free in GPU in Google Chrome prior to 148.0.7778.1…3.1
- CVE-2026-85530The GiveWP WordPress plugin before 4.16.8.1 does not consis…8.1
- CVE-2026-85531Improper verification of cryptographic signature vulnerabili…9.8
- CVE-2026-85532Apache WSS4J accepted attacker-controlled derived-key length…7.5
Are you affected by CVE-2026-85526?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST