GHSA-J3FJ-QPPJ-FMMC Mailpit has an incomplete fix for GHSA-6jxm: HTML check still permits SSRF to private/loopback/IMDS via missing IP-filter dialer

Summary The fix for GHSA-6jxm-fv7w-rw5j CVE-2026-23845, "Server-Side Request Forgery SSRF via HTML Check API", shipped in mailpit v1.28.3, hardened internal/htmlcheck/css.go::downloadCSSToBytes with a 5MB size cap, a text/css content-type check, login-info stripping in isValidURL, and an opt-in...

PT-2026-6514

Mailpit has a Server-Side Request Forgery SSRF via HTML Check API in github.com/axllent/mailpit...

Server-Side Request Forgery (SSRF)

github.com/axllent/mailpit is vulnerable to Server-Side Request Forgery SSRF. The vulnerability is due to the HTML Check feature automatically downloading remote CSS resources without proper validation, which allows an attacker to embed malicious stylesheet links in emails and trigger unauthorize...

EUVD-2026-3296

Mailpit has a Server-Side Request Forgery SSRF via HTML Check API...

GHSA-6JXM-FV7W-RW5J Mailpit has a Server-Side Request Forgery (SSRF) via HTML Check API

Server-Side Request Forgery SSRF via HTML Check CSS Download The HTML Check feature /api/v1/message/ID/html-check is designed to analyze HTML emails for compatibility. During this process, the inlineRemoteCSS function automatically downloads CSS files from external tags to inline them for testing...

Mailpit has a Server-Side Request Forgery (SSRF) via HTML Check API

Server-Side Request Forgery SSRF via HTML Check CSS Download The HTML Check feature /api/v1/message/ID/html-check is designed to analyze HTML emails for compatibility. During this process, the inlineRemoteCSS function automatically downloads CSS files from external tags to inline them for testing...

CVE-2026-23845

Mailpit is an email testing tool and API for developers. Versions prior to 1.28.3 are vulnerable to Server-Side Request Forgery SSRF via HTML Check CSS Download. The HTML Check feature /api/v1/message/ID/html-check is designed to analyze HTML emails for compatibility. During this process, the...

CVE-2026-23845

Mailpit is an email testing tool and API for developers. Versions prior to 1.28.3 are vulnerable to Server-Side Request Forgery SSRF via HTML Check CSS Download. The HTML Check feature /api/v1/message/ID/html-check is designed to analyze HTML emails for compatibility. During this process, the...

CVE-2026-23845 Mailpit Vulnerable to Server-Side Request Forgery (SSRF) via HTML Check API

Mailpit is an email testing tool and API for developers. Versions prior to 1.28.3 are vulnerable to Server-Side Request Forgery SSRF via HTML Check CSS Download. The HTML Check feature /api/v1/message/ID/html-check is designed to analyze HTML emails for compatibility. During this process, the...

CVE-2026-23845 Mailpit Vulnerable to Server-Side Request Forgery (SSRF) via HTML Check API

Mailpit is an email testing tool and API for developers. Versions prior to 1.28.3 are vulnerable to Server-Side Request Forgery SSRF via HTML Check CSS Download. The HTML Check feature /api/v1/message/ID/html-check is designed to analyze HTML emails for compatibility. During this process, the...

CVE-2026-23845

Mailpit is an email testing tool and API for developers. Versions prior to 1.28.3 are vulnerable to Server-Side Request Forgery SSRF via HTML Check CSS Download. The HTML Check feature /api/v1/message/ID/html-check is designed to analyze HTML emails for compatibility. During this process, the...

CVE-2026-23845

Mailpit (github.com/axllent/mailpit) is affected by SSRF via the HTML Check API. The HTMLCheck flow processes HTML emails by inlining external CSS files through inlineRemoteCSS(), which fetches URLs found in tags. Root cause: insufficient URL validation and unrestricted external fetching in isUR...

PT-2026-3488

Name of the Vulnerable Software and Affected Versions Mailpit versions prior to 1.28.3 Description Mailpit, an email testing tool and API for developers, contains a Server-Side Request Forgery SSRF issue. This flaw is related to the HTML Check CSS Download functionality, specifically within the...

Mailpit code issue vulnerabilities

Mailpit is an email testing tool developed by Ralph Slooten personally. Versions of Mailpit prior to 1.28.3 had a code vulnerability. This vulnerability stemmed from the inlineRemoteCSS function in the HTML Check feature, which allowed external CSS files to be downloaded, potentially leading to...

cgi.tu-chemnitz.de XSS vulnerability

Open Bug Bounty ID: OBB-701313 Description| Value ---|--- Affected Website:| cgi.tu-chemnitz.de Open Bug Bounty Program:| View Open Bug Bounty Program Vulnerable Application:| Custom Code Vulnerability Type:| XSS Cross Site Scripting / CWE-79 CVSSv3 Score:| 6.1...