CVE-2026-40256— Weblate: Prefix-Based Repository Boundary Check Bypass via Symlink/Junction Path Prefix Collision
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I. Basic Information for CVE-2026-40256
Vulnerability Information
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Vulnerability Title
Weblate: Prefix-Based Repository Boundary Check Bypass via Symlink/Junction Path Prefix Collision
Source: NVD (National Vulnerability Database)
Vulnerability Description
Weblate is a web based localization tool. In versions prior to 5.17, repository-boundary validation relies on string prefix checks on resolved absolute paths. In multiple code paths, the check uses startswith against the repository root path. This is not path-segment aware and can be bypassed when the external path shares the same string prefix as the repository path (for example, repo and repo_outside). This issue has been fixed in version 5.17.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Weblate 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Weblate是Weblate开源的一个 Copyleft 的基于 web 的自由软件持续本地化系统。 Weblate 5.17之前版本存在安全漏洞，该漏洞源于存储库边界验证存在绕过问题，可能导致路径遍历。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| WeblateOrg | weblate | < 5.17 | - |
II. Public POCs for CVE-2026-40256
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|---|
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Same Patch Batch · WeblateOrg · 2026-04-15 · 10 CVEs total
| CVE-2026-34393 | 8.8 HIGH | Weblate: Privilege escalation in the user API endpoint |
| CVE-2026-33435 | 8.1 HIGH | Weblate: Remote code execution during backup restoration |
| CVE-2026-34242 | 7.7 HIGH | Weblate: Arbitrary File Read via Symlink |
| CVE-2026-33220 | 6.8 MEDIUM | Weblate: JavaScript localization CDN add-on allows arbitrary local file read outside the r |
| CVE-2026-34244 | 5.0 MEDIUM | Weblate: SSRF via Project-Level Machinery Configuration |
| CVE-2026-33440 | 5.0 MEDIUM | Weblate: Authenticated SSRF via redirect bypass of ALLOWED_ASSET_DOMAINS in screenshot URL |
| CVE-2026-33214 | 4.3 MEDIUM | Weblate has improper access control for the translation memory API |
| CVE-2026-39845 | 4.1 MEDIUM | Weblate: SSRF via the webhook add-on using unprotected fetch_url() |
| CVE-2026-33212 | 3.1 LOW | Weblate: Improper access control for pending tasks in API |
IV. Related Vulnerabilities
Same product: weblate
- CVE-2026-44264
Weblate is vulnerable to XSS via crafted Markdown - CVE-2026-44263
Weblate: Private Translation Enumeration via Screenshot API - CVE-2026-41519
Weblate's API Token Not Invalidated on Password Change - CVE-2026-41654
Weblate is Vulnerable to Authenticated SSRF via Project Back - CVE-2026-39845
Weblate: SSRF via the webhook add-on using unprotected fetch
Same vendor: WeblateOrg
- CVE-2026-42150
wlc: print_html outputs API data without HTML escaping, enab - CVE-2026-44264
Weblate is vulnerable to XSS via crafted Markdown - CVE-2026-44263
Weblate: Private Translation Enumeration via Screenshot API - CVE-2026-41519
Weblate's API Token Not Invalidated on Password Change - CVE-2026-41654
Weblate is Vulnerable to Authenticated SSRF via Project Back
Same weakness: CWE-22
- CVE-2026-42351
pygeoapi: Path Traversal in STAC FileSystemProvider - CVE-2026-42213
SolidCAM-GPPL-IDE: Path traversal in `inc` directive enables - CVE-2026-7807
SmarterTools SmarterMail < Build 9560 Server Local File Incl - CVE-2026-42028
novaGallery: Unauthenticated Path Traversal in Album and Cac - CVE-2026-41887
Flarum: Path traversal in LESS parser via theme color settin
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