GHSA-CWCX-382V-8M9G
Vulnerability from github – Published: 2026-04-30 17:28 – Updated: 2026-05-08 21:47
VLAI
Summary
Weblate Vulnerable to Authenticated SSRF via Project Backup Import bypassing validate_repo_url
Details
Impact
An authenticated user with project.add permission (default on hosted Weblate SaaS and for any user holding an active billing/trial plan) can import a crafted project backup ZIP whose components/<name>.json contains an attacker-chosen repo URL pointing at a private address (e.g. http://127.0.0.1:9999/) or using a non-allow-listed scheme (e.g. file://, git://). Weblate persists the component via Component.objects.bulk_create([component])[0], which bypasses Django's full_clean() and therefore never runs the validate_repo_url validator. The URL is subsequently written verbatim into .git/config by configure_repo(pull=False).
Patches
- https://github.com/WeblateOrg/weblate/pull/19061
- https://github.com/WeblateOrg/weblate/pull/19062
Workarounds
Limiting who can create projects limits the scope.
Resources
Weblate thanks @fg0x0 for reporting this vulnerability via GitHub.
Severity
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "weblate"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.17.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-41654"
],
"database_specific": {
"cwe_ids": [
"CWE-20",
"CWE-918"
],
"github_reviewed": true,
"github_reviewed_at": "2026-04-30T17:28:41Z",
"nvd_published_at": "2026-05-07T15:16:07Z",
"severity": "MODERATE"
},
"details": "### Impact\nAn authenticated user with `project.add` permission (default on hosted Weblate SaaS and for any user holding an active billing/trial plan) can import a crafted project backup ZIP whose `components/\u003cname\u003e.json` contains an attacker-chosen `repo` URL pointing at a **private address** (e.g. `http://127.0.0.1:9999/`) or using a **non-allow-listed scheme** (e.g. `file://`, `git://`). Weblate persists the component via `Component.objects.bulk_create([component])[0]`, which bypasses Django\u0027s `full_clean()` and therefore never runs the `validate_repo_url` validator. The URL is subsequently written verbatim into `.git/config` by `configure_repo(pull=False)`.\n\n### Patches\n* https://github.com/WeblateOrg/weblate/pull/19061\n* https://github.com/WeblateOrg/weblate/pull/19062 \n\n### Workarounds\nLimiting who can create projects limits the scope.\n\n### Resources\nWeblate thanks @fg0x0 for reporting this vulnerability via GitHub.",
"id": "GHSA-cwcx-382v-8m9g",
"modified": "2026-05-08T21:47:36Z",
"published": "2026-04-30T17:28:41Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-cwcx-382v-8m9g"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41654"
},
{
"type": "WEB",
"url": "https://github.com/WeblateOrg/weblate/pull/19061"
},
{
"type": "WEB",
"url": "https://github.com/WeblateOrg/weblate/pull/19062"
},
{
"type": "WEB",
"url": "https://github.com/WeblateOrg/weblate/commit/e1eff1f517c1ee315d69581910baaabb724e5ef0"
},
{
"type": "WEB",
"url": "https://github.com/WeblateOrg/weblate/commit/e4b67a76d95d5165ecb9937f7485fd79223b7f14"
},
{
"type": "PACKAGE",
"url": "https://github.com/WeblateOrg/weblate"
},
{
"type": "WEB",
"url": "https://github.com/WeblateOrg/weblate/releases/tag/weblate-5.17.1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Weblate Vulnerable to Authenticated SSRF via Project Backup Import bypassing validate_repo_url"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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