CVE-2026-23845: GO-2026-4345 - Mailpit has a Server-Side Request Forgery (SSRF) via HTML Check API in github.com/axllent/mailpit

CVE-2026-23845 · Severity: low · CVSS 3.1 · Published 2026-02-03

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

Technologies: github.com/axllent/mailpit (Go). Vendors: Go.

Quick answers

Is CVE-2026-23845 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-23845 being exploited in the wild.
How severe is CVE-2026-23845?
Low severity, with a CVSS score of 3.1, published 3 February 2026.
Which products and versions are affected?
github.com/axllent/mailpit (Go) SEMVER:introduced=0,fixed=1.28.3.
Is there a fix for CVE-2026-23845?
Yes. github.com/axllent/mailpit (Go): upgrade to 1.28.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-23845?
Check whether you run github.com/axllent/mailpit (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/axllent/mailpit (Go): upgrade to 1.28.3 or later
    go get github.com/axllent/mailpit@v1.28.3

Affected products

  • github.com/axllent/mailpit (Go) SEMVER:introduced=0,fixed=1.28.3

Identifiers

  • CVE-2026-23845
  • GHSA-6jxm-fv7w-rw5j
  • GO-2026-4345

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