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CVE-2026-45709

Mailpit is an email testing tool and API for developers. 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 `--block-remote-css-and-fonts` config flag — but did not add the IP-filtering dialer that the same codebase already uses on the two sister SSRF
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:04236a748845f8b732b899f7e075345a4a4a9a3a67504117b10a5b90cf9db7e1
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"mailpit","vendor":"axllent","versions":[{"status":"affected","version":">= 1.28.3, < 1.30.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2bba256b03dd417a591317a0e209bc28609c41b1e5fe21c81bd2d789fb824ece · sha256:92fa73388ef1b006… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.8,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2bba256b03dd417a591317a0e209bc28609c41b1e5fe21c81bd2d789fb824ece · sha256:92fa73388ef1b006… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2bba256b03dd417a591317a0e209bc28609c41b1e5fe21c81bd2d789fb824ece · sha256:92fa73388ef1b006… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/axllent/mailpit/releases/tag/v1.30.0","tags":["x_refsource_MISC"],"url":"https://github.com/axllent/mailpit/releases/tag/v1.30.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2bba256b03dd417a591317a0e209bc28609c41b1e5fe21c81bd2d789fb824ece · sha256:92fa73388ef1b006… · /containers/cna/references/1
{"name":"https://github.com/axllent/mailpit/security/advisories/GHSA-j3fj-qppj-fmmc","tags":["x_refsource_CONFIRM"],"url":"https://github.com/axllent/mailpit/security/advisories/GHSA-j3fj-qppj-fmmc"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2bba256b03dd417a591317a0e209bc28609c41b1e5fe21c81bd2d789fb824ece · sha256:92fa73388ef1b006… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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