CVE-2026-45229Network attack vector

Authenticated administrator takeover via unrestricted configuration update

Published May 13, 2026 · Updated May 13, 2026

Mass assignment in quark-auto-save before 0.8.5 allows remote authenticated users to take over administrator access through POST /update. The endpoint copies every JSON key except two denied names into config_data, so a supplied webui object replaces the stored username and password. Any authenticated WebUI session or valid API token reaches the endpoint; credential replacement locks out administrators and exposes stored tasks, cloud tokens, and notification settings.

CVSS severity8.7
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Mass assignment in quark-auto-save before 0.8.5 allows remote authenticated users to take over administrator access through POST /update. The endpoint copies every JSON key except two denied names into config_data, so a supplied webui object replaces the stored username and password. Any authenticated WebUI session or valid API token reaches the endpoint; credential replacement locks out administrators and exposes stored tasks, cloud tokens, and notification settings.

The record

CVE
CVE-2026-45229
Published
May 13, 2026
Updated
May 13, 2026
Vendor
Cp0204
Product
quark-auto-save
Classifications
CWE-915, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2026CVE publishedPublication date reported by the CVE source.
  2. May 13, 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 <0.8.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cp0204 · quark-auto-saveversion=0 <0.8.5

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-915Improperly Controlled Modification of Dynamically-Determined Object Attributes
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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