How severe is CVE-2026-27457?

CVE-2026-27457 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-27457 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27457?

CVE-2026-27457 affects Weblate. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27457?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-27457 have an EU (EUVD) identifier?

Yes. CVE-2026-27457 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8897.

When was CVE-2026-27457 published?

CVE-2026-27457 was published on 2026-02-26 and last updated on 2026-06-17.

CVE-2026-27457

CVE-2026-27457 is a medium-severity vulnerability in Weblate with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8897
Weakness: CWE-862
Affected product: Weblate
Published: 2026-02-26
Last modified: 2026-06-17

Description

Weblate is a web based localization tool. Prior to version 5.16.1, the REST API's `AddonViewSet` (`weblate/api/views.py`, line 2831) uses `queryset = Addon.objects.all()` without overriding `get_queryset()` to scope results by user permissions. This allows any authenticated user (or anonymous users if `REQUIRE_LOGIN` is not set) to list and retrieve ALL addons across all projects and components via `GET /api/addons/` and `GET /api/addons/{id}/`. Version 5.16.1 fixes the issue.

Frequently asked questions

What is CVE-2026-27457?: Weblate is a web based localization tool. Prior to version 5.16.1, the REST API's `AddonViewSet` (`weblate/api/views.py`, line 2831) uses `queryset = Addon.objects.all()` without overriding `get_queryset()` to scope results by user permissions. This allows any authenticated user (or anonymous users if `REQUIRE_LOGIN` is not set) to list and retrieve ALL addons across all projects and components via `GET /api/addons/` and `GET /api/addons/{id}/`. Version 5.16.1 fixes the issue.
How severe is CVE-2026-27457?: CVE-2026-27457 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-27457 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27457?: CVE-2026-27457 affects Weblate. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27457?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27457 have an EU (EUVD) identifier?: Yes. CVE-2026-27457 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8897.
When was CVE-2026-27457 published?: CVE-2026-27457 was published on 2026-02-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:weblate:weblate:*:*:*:*:*:*:*:*

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