CVE-2026-45712

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Source
https://cve.org/CVERecord?id=CVE-2026-45712
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45712.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-45712
Aliases
Downstream
Related
Published
2026-07-20T14:59:40.516Z
Modified
2026-08-12T03:51:44.993023095Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Mailpit: Concurrent map read & write in proxy CSS rewriter - remote unauth crash (fatal error: concurrent map read and map write)
Details

Mailpit is an email testing tool and API for developers. Prior to version 1.30.0, the screenshot/print proxy (/proxy?data=…) maintains a package-level assets map[string]MessageAssets cache, but reads the map without holding assetsMutex while a long-running cleanup goroutine and (re-entrant) CSS-rewriting code path concurrently write to it under the lock. When the unsynchronized read coincides with a synchronized write, Go's runtime raises fatal error: concurrent map read and map write — a runtime.throw that is not recoverable by http.Server's handler-panic recover. The whole Mailpit process exits, taking the SMTP, POP3 and HTTP listeners down with it. Version 1.30.0 contains a patch.

Database specific 
{
    "cwe_ids": [
        "CWE-362",
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45712.json",
    "cna_assigner": "GitHub_M"
}
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
af8756a32cf7ecf06bef109c1348b783f1a239ee
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:axllent:mailpit:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.30.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

1.*
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
v1.28.3
v1.28.4
v1.29.0
v1.29.1
v1.29.2
v1.29.3
v1.29.4
v1.29.5
v1.29.6
v1.29.7
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-2026-45712.json"