{"cve":"CVE-2026-27808","nvd":{"published":"2026-02-26T00:16:26.013","modified":"2026-06-17T10:27:43.150","status":"Analyzed","description":"Mailpit is an email testing tool and API for developers. Prior to version 1.29.2, the Link Check API (/api/v1/message/{ID}/link-check) is vulnerable to Server-Side Request Forgery (SSRF). The server performs HTTP HEAD requests to every URL found in an email without validating target hosts or filtering private/internal IP addresses. The response returns status codes and status text per link, making this a non-blind SSRF. In the default configuration (no authentication on SMTP or API), this is fully exploitable remotely with zero user interaction. This is the same class of vulnerability that was fixed in the HTML Check API (CVE-2026-23845 / GHSA-6jxm-fv7w-rw5j) and the screenshot proxy (CVE-2026-21859 / GHSA-8v65-47jx-7mfr), but the Link Check code path was not included in either fix. Version 1.29.2 fixes this vulnerability.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","score":8.6},"cwes":["CWE-918"],"references":["https://github.com/axllent/mailpit/commit/10ad4df8cc0cd9e51dea1b4410009545eef7fbf5","https://github.com/axllent/mailpit/releases/tag/v1.29.2","https://github.com/axllent/mailpit/security/advisories/GHSA-mpf7-p9x7-96r3","https://github.com/axllent/mailpit/security/advisories/GHSA-mpf7-p9x7-96r3"],"products":["axllent:mailpit"],"source":"nvd","synced_at":"2026-10-19T22:24:17.937441719+00:00"},"epss":{"cve":"CVE-2026-27808","score":0.00532,"percentile":0.44987,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-mpf7-p9x7-96r3","url":"https://osv.dev/vulnerability/GHSA-mpf7-p9x7-96r3","summary":"Mailpit is Vulnerable to Server-Side Request Forgery (SSRF) via Link Check API","modified":"2026-03-09T01:13:05.377768113Z","packages":[{"ecosystem":"Go","name":"github.com/axllent/mailpit","purl":"pkg:golang/github.com/axllent/mailpit","ranges":["<1.29.2"],"fixed":["1.29.2"]}]},{"id":"GO-2026-4558","url":"https://osv.dev/vulnerability/GO-2026-4558","summary":"Mailpit is Vulnerable to Server-Side Request Forgery (SSRF) via Link Check API in github.com/axllent/mailpit","modified":"2026-03-09T01:13:05.377768Z","packages":[{"ecosystem":"Go","name":"github.com/axllent/mailpit","purl":"pkg:golang/github.com/axllent/mailpit","ranges":["<1.29.2"],"fixed":["1.29.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}