CVE-2026-49103

CRITICALNVD 9.4Trending — 3 sources updated this week

9.4

Webmin before 2.640 does not safely construct a filename for saving of an attachment within the mailboxes component. This occurs in mailboxes/detachall.cgi.

CVSS v3: 9.4
EG Score: 0.0(none)
EPSS: 14.6%
KEV: Not listed

Published

May 27, 2026

Last Modified

May 27, 2026

Advisory Details (2)

Auto-updated May 28, 2026

Upstream fix merged — awaiting tagged release. Sources: github_commit.

generic

Comparing 2.630...2.640 · webmin/webmin · GitHub

https://github.com/webmin/webmin/compare/2.630...2.640

github_commit

commit cf432879a145 (webmin/webmin)

Fix landed in webmin/webmin commit cf432879a145 — awaiting tagged release

https://github.com/webmin/webmin/commit/cf432879a14568c4bb44cd2f9e5a9bd0e168edc1

Vendor Advisories for CVE-2026-49103(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

GHSA-6m8g-7xrr-8q5f
GitHub Security AdvisoriesCritical
Webmin before 2.640 does not safely construct a filename for saving of an attachment within the...

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-24

Data Freshness Timeline

(refreshed 10× in last 7d / 10× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 15:35 UTCEG score recompute
2026-05-27 15:35 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-49103?

CVE-2026-49103 is a critical vulnerability published on May 27, 2026. Webmin before 2.640 does not safely construct a filename for saving of an attachment within the mailboxes component. This occurs in mailboxes/detachall.cgi.

When was CVE-2026-49103 disclosed?

CVE-2026-49103 was first published in the National Vulnerability Database on May 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-49103 actively exploited?

CVE-2026-49103 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-49103?

CVE-2026-49103 has a CVSS v3 base score of 9.4 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 0.0.

How do I remediate CVE-2026-49103?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49103, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-49103

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