CVE-2026-27457Network attack vector

Addon configuration disclosure via unscoped API queryset

Published Feb 26, 2026 · Updated Feb 26, 2026

Missing authorization in Weblate before 5.16.1 allows remote authenticated users to read all add-on configurations through its REST API. AddonViewSet binds Addon.objects.all() as its queryset instead of filtering records to projects the requester is permitted to administer. Anonymous access is also exposed when REQUIRE_LOGIN is disabled; the consequence is disclosure of add-on settings across projects and components.

CVSS severity4.3
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Weblate before 5.16.1 allows remote authenticated users to read all add-on configurations through its REST API. AddonViewSet binds Addon.objects.all() as its queryset instead of filtering records to projects the requester is permitted to administer. Anonymous access is also exposed when REQUIRE_LOGIN is disabled; the consequence is disclosure of add-on settings across projects and components.

The record

CVE
CVE-2026-27457
Published
Feb 26, 2026
Updated
Feb 26, 2026
Vendor
Weblate
Product
Weblate
Classifications
CWE-200, CWE-862
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 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=< 5.16.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Weblate · Weblateversion=< 5.16.1

Published CVSS scores

4.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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.

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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-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-862Missing Authorization

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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