CVE-2026-23829

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Source
https://cve.org/CVERecord?id=CVE-2026-23829
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23829.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-23829
Aliases
Published
2026-01-18T23:23:04.176Z
Modified
2026-01-28T05:53:31.870354Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
Summary
Mailpit has SMTP Header Injection via Regex Bypass
Details

Mailpit is an email testing tool and API for developers. Prior to version 1.28.3, Mailpit's SMTP server is vulnerable to Header Injection due to an insufficient Regular Expression used to validate RCPT TO and MAIL FROM addresses. An attacker can inject arbitrary SMTP headers (or corrupt existing ones) by including carriage return characters (\r) in the email address. This header injection occurs because the regex intended to filter control characters fails to exclude \r and \n when used inside a character class. Version 1.28.3 fixes this issue.

Database specific 
{
    "cwe_ids": [
        "CWE-150",
        "CWE-93"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23829.json"
}
References

Affected packages

Git / github.com/axllent/mailpit

Affected ranges

Type
GIT
Repo
https://github.com/axllent/mailpit
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
eac491cd897127de41b0e26210be93a041f836dd

Affected versions

0.*

0.0.1-beta
0.0.2
0.0.3
0.0.4
0.0.5
0.0.6
0.0.7
0.0.8
0.0.9
0.1.0
0.1.1
0.1.2
0.1.3
0.1.4
0.1.5

1.*

1.0.0
1.0.0-beta1
1.1.0
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
1.1.7
1.2.0
1.2.1
1.2.2
1.2.3
1.2.4
1.2.5

v1.*

v1.10.0
v1.10.1
v1.10.2
v1.10.3
v1.10.4
v1.11.0
v1.11.1
v1.12.0
v1.12.1
v1.13.0
v1.13.1
v1.13.2
v1.13.3
v1.14.0
v1.14.1
v1.14.2
v1.14.3
v1.14.4
v1.15.0
v1.15.1
v1.16.0
v1.17.0
v1.17.1
v1.18.0
v1.18.1
v1.18.2
v1.18.3
v1.18.4
v1.18.5
v1.18.6
v1.18.7
v1.19.0
v1.19.1
v1.19.2
v1.19.3
v1.2.6
v1.2.7
v1.2.8
v1.2.9
v1.20.0
v1.20.1
v1.20.2
v1.20.3
v1.20.4
v1.20.5
v1.20.6
v1.20.7
v1.21.0
v1.21.1
v1.21.2
v1.21.3
v1.21.4
v1.21.5
v1.21.6
v1.21.7
v1.21.8
v1.22.0
v1.22.1
v1.22.2
v1.22.3
v1.23.0
v1.23.1
v1.23.2
v1.24.0
v1.24.1
v1.24.2
v1.25.0
v1.25.1
v1.26.0
v1.26.1
v1.26.2
v1.27.0
v1.27.1
v1.27.10
v1.27.11
v1.27.2
v1.27.3
v1.27.4
v1.27.5
v1.27.6
v1.27.7
v1.27.8
v1.27.9
v1.28.0
v1.28.1
v1.28.2
v1.3.0
v1.3.1
v1.3.10
v1.3.11
v1.3.2
v1.3.3
v1.3.4
v1.3.5
v1.3.6
v1.3.7
v1.3.8
v1.3.9
v1.4.0
v1.5.0
v1.5.1
v1.5.2
v1.5.3
v1.5.4
v1.5.5
v1.6.0
v1.6.1
v1.6.10
v1.6.11
v1.6.12
v1.6.13
v1.6.14
v1.6.15
v1.6.16
v1.6.17
v1.6.18
v1.6.19
v1.6.2
v1.6.20
v1.6.21
v1.6.22
v1.6.3
v1.6.4
v1.6.5
v1.6.6
v1.6.7
v1.6.8
v1.6.9
v1.7.0
v1.7.1
v1.8.0
v1.8.1
v1.8.2
v1.8.3
v1.8.4
v1.9.0
v1.9.1
v1.9.10
v1.9.2
v1.9.3
v1.9.4
v1.9.5
v1.9.6
v1.9.7
v1.9.8
v1.9.9

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23829.json"