CVE-2026-45711: Mailpit is an email testing tool and API for developers

Q: How do I fix CVE-2026-45711?

mailpit: upgrade to 1.30.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-45711 being exploited?

CVE-2026-45711 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-45711 affect?

CVE-2026-45711 affects mailpit. Severity is medium (CVSS 5.9). Mailpit is an email testing tool and API for developers. Prior to version 1.30.0, the mailpit dump --http sub-command downloads every message from a remote Mailpit instance and writes each one as .eml inside the use

Routine

MEDIUM 5.9UPGRADE

CVE-2026-45711 is a medium-severity flaw (CVSS 5.9) affecting mailpit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Mailpit is an email testing tool and API for developers. Prior to version 1.30.0, the mailpit dump --http <base-url> <out-dir> sub-command downloads every message from a remote Mailpit instance and writes each one as <id>.eml inside the user-supplied output directory. The message ID field is taken verbatim from the JSON response of the remote server and concatenated into the output path with path.Join, which silently normalizes `..` segments. A m

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-22, CWE-829
Published	2026-07-20
Last modified	2026-10-24

Publisher (CNA): GitHub, Inc. · Vendor: axllent

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-20 16:17 UTCPublished CVE record published
2026-10-24 20:10 UTCUpdated Record last modified

axllent mailpit UPGRADE

Affected: < 1.30.0

Fixed in: 1.30.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mailpit || rpm -q mailpit || mailpit --version

2. UPGRADE to 1.30.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mailpit

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mailpit

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-45711?

mailpit: upgrade to 1.30.0. Exact commands for each OS are on this page.

Is CVE-2026-45711 being exploited?

CVE-2026-45711 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-45711 affect?

CVE-2026-45711 affects mailpit. Severity is medium (CVSS 5.9). Mailpit is an email testing tool and API for developers. Prior to version 1.30.0, the mailpit dump --http <base-url> <out-dir> sub-command downloads every message from a remote Mailpit instance and writes each one as <id>.eml inside the use

How urgent is CVE-2026-45711?

Priority 34/100. Public exploit reference

Related CVEs

CVE-2026-45713 HIGH 7.5 UPGRADE Mailpit is an email testing tool and API for developers
CVE-2026-48824 MEDIUM 5.3 UPGRADE Mailpit is an email testing tool and API for developers
CVE-2026-45712 MEDIUM 5.9 UPGRADE Mailpit is an email testing tool and API for developers
CVE-2026-45709 MEDIUM 5.8 UPGRADE Mailpit is an email testing tool and API for developers

References

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