CVE-2026-33440Network attack vector

Authenticated SSRF via unchecked redirect targets

Published Apr 15, 2026 · Updated Apr 15, 2026

SSRF in Weblate before 5.17 allows remote authenticated users to make server-side requests via redirected screenshot URLs. The screenshot URL downloader validated only the initial host, then followed redirects without reapplying ALLOWED_ASSET_DOMAINS. A low-privilege account and a restrictive domain allowlist are required; exploitation reaches disallowed hosts and exposes retrieved image data.

CVSS severity5.0
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Weblate before 5.17 allows remote authenticated users to make server-side requests via redirected screenshot URLs. The screenshot URL downloader validated only the initial host, then followed redirects without reapplying ALLOWED_ASSET_DOMAINS. A low-privilege account and a restrictive domain allowlist are required; exploitation reaches disallowed hosts and exposes retrieved image data.

The record

CVE
CVE-2026-33440
Published
Apr 15, 2026
Updated
Apr 15, 2026
Vendor
Weblate
Product
Weblate
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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=< 5.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Weblate · Weblateversion=< 5.17

Published CVSS scores

5.0GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
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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