CVE-2026-11853Network attack vector

Arbitrary file overwrite via unchecked manifest paths

Published Jun 10, 2026 · Updated Jun 10, 2026

Path traversal in Debian Debusine 0.12.0 through 0.14.8 allows remote attackers to overwrite worker-accessible files via crafted manifests. The Deb822 parser accepts multi-component filenames such as ../file from Files and checksum fields, and MergeUploads uses them to create symlinks outside its working directory. An unauthenticated network submission of a crafted .dsc or .changes artifact is sufficient, and the overwrite is limited to paths writable by the worker account.

CVSS severity6.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Debian Debusine 0.12.0 through 0.14.8 allows remote attackers to overwrite worker-accessible files via crafted manifests. The Deb822 parser accepts multi-component filenames such as ../file from Files and checksum fields, and MergeUploads uses them to create symlinks outside its working directory. An unauthenticated network submission of a crafted .dsc or .changes artifact is sufficient, and the overwrite is limited to paths writable by the worker account.

The record

CVE
CVE-2026-11853
Published
Jun 10, 2026
Updated
Jun 10, 2026
Vendor
Debian
Product
Debusine
Classifications
CWE-59, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 10, 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=0.12.0 <0.14.9 changes=[{"at":"0.14.9","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Debian · Debusineversion=0.12.0 <0.14.9 changes=[{"at":"0.14.9","status":"unaffected"}]

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-59Improper Link Resolution Before File Access ('Link Following')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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