How severe is CVE-2026-21889?

CVE-2026-21889 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-21889 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21889?

CVE-2026-21889 affects Weblate. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-21889?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-21889 have an EU (EUVD) identifier?

Yes. CVE-2026-21889 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2452.

When was CVE-2026-21889 published?

CVE-2026-21889 was published on 2026-01-14 and last updated on 2026-06-17.

CVE-2026-21889

CVE-2026-21889 is a high-severity vulnerability in Weblate with a CVSS 3.x base score of 7.5. 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-284.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 2.3
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2452
Weakness: CWE-284
Affected product: Weblate
Published: 2026-01-14
Last modified: 2026-06-17

Description

Weblate is a web based localization tool. Prior to 5.15.2, the screenshot images were served directly by the HTTP server without proper access control. This could allow an unauthenticated user to access screenshots after guessing their filename. This vulnerability is fixed in 5.15.2.

Frequently asked questions

What is CVE-2026-21889?: Weblate is a web based localization tool. Prior to 5.15.2, the screenshot images were served directly by the HTTP server without proper access control. This could allow an unauthenticated user to access screenshots after guessing their filename. This vulnerability is fixed in 5.15.2.
How severe is CVE-2026-21889?: CVE-2026-21889 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-21889 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21889?: CVE-2026-21889 affects Weblate. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-21889?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-21889 have an EU (EUVD) identifier?: Yes. CVE-2026-21889 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2452.
When was CVE-2026-21889 published?: CVE-2026-21889 was published on 2026-01-14 and last updated on 2026-06-17.

References

Affected products (1)

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

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