CVE-2026-87798Network attack vectorHinoki check available

Client-host file overwrite via inconsistent VM agent listings

Published Sep 28, 2026 · Updated Sep 28, 2026

Improper link resolution in Canonical LXD's recursive CLI pull on Linux allows guest OS users to write files outside the client target. The client trusts inconsistent SFTP directory listings and Lstat results: a duplicate entry first creates a symlink, then a later file or directory operation follows it. Exploitation requires root control of a VM agent and an operator-initiated recursive pull; writes carry the operator's privileges, and container transfers are unaffected.

CVSS severity5.8
Medium
EPSS probability0.19%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper link resolution in Canonical LXD's recursive CLI pull on Linux allows guest OS users to write files outside the client target. The client trusts inconsistent SFTP directory listings and Lstat results: a duplicate entry first creates a symlink, then a later file or directory operation follows it. Exploitation requires root control of a VM agent and an operator-initiated recursive pull; writes carry the operator's privileges, and container transfers are unaffected.

The record

CVE
CVE-2026-87798
Published
Sep 28, 2026
Updated
Sep 28, 2026
Vendor
Canonical Ltd.
Product
LXD
Classifications
CWE-59, CAPEC-132, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0.2 <4.0.14
  2. Affected versionversion=5.0.0 <5.0.10
  3. Affected versionversion=5.21.0 <5.21.8
  4. Affected versionversion=6.0 <6.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Canonical Ltd. · LXDversion=4.0.2 <4.0.14; version=5.0.0 <5.0.10; version=5.21.0 <5.21.8; version=6.0 <6.9

Published CVSS scores

5.8CanonicalCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-59Improper Link Resolution Before File Access ('Link Following')
CAPEC-132Symlink Attack
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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