Weblate: Authenticated SSRF via redirect bypass of ALLOWED_ASSET_DOMAINS in screenshot URL uploads
Weblate is a web based localization tool. In versions prior to 5.17, the ALLOWED_ASSET_DOMAINS setting applied only to the first issued requests and didn't restrict possible redirects. This issue has been fixed in version 5.17.
- Published
- Apr 15, 2026
- Updated
- Jun 17, 2026
- EPSS
- 0.3% · 21th percentile
- CWE
- CWE-918
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Report tools
Action score
20
Monitor
Low priority for now.
- CVSS
- 20 / 40 · 5.0 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.3%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · GitHub_M
- 5.0
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| weblate | weblate | cpe:2.3:a:weblate:weblate |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- weblate weblatebefore 5.17
Versions reported by the vendor
Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.
WeblateOrg weblate
- < 5.17affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| PyPI | weblate | before 5.17 | 5.17 |
Same product
weblate: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-24126Weblate has an argument injection in management console36Monitor
- CVE-2025-68398Weblate has git config file overwrite vulnerability that leads to remote code execution36Monitor
- CVE-2022-23915Remote Code Execution (RCE)36Monitor
- CVE-2026-34393Weblate: Privilege escalation in the user API endpoint35Monitor
- CVE-2026-33435Weblate: Remote code execution during backup restoration32Monitor
- CVE-2026-34242Weblate: Arbitrary File Read via Symlink30Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| WeblateOrg weblate | 5.17 · description | Vendor (CNA) |
| PyPI:weblate | 5.17 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2026-398450 days apartWeblate: SSRF via the webhook add-on using unprotected fetch_url()16Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- low · data can be read
- Integrity
- none
- Availability
- none
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- Low
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-918 · Server-Side Request Forgery (SSRF)CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- github.com/WeblateOrg/weblate/commit/8be80625a864c8db5854503872a65e8a0b7399a6
- github.com/WeblateOrg/weblate/security/advisories/GHSA-5fhx-9jwj-867m
Vendor advisories and official records. Exploit/PoC links are deliberately left out.