Webmin up to 2.639 Mailboxes path traversal

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Webmin up to 2.639. This impacts an unknown function of the component Mailboxes. The manipulation leads to path traversal. This vulnerability is traded as CVE-2026-49103. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Webmin up to 2.639. This issue affects an unknown code of the component Mailboxes. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-24. The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize "../" sequences that can resolve to a location that is outside of that directory. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-49103 since 05/27/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 2.640 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch cf432879a14568c4bb44cd2f9e5a9bd0e168edc1 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-32532). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-24 / CWE-23 / CWE-22
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Webmin 2.640
Patch: cf432879a14568c4bb44cd2f9e5a9bd0e168edc1

Timelineinfo

05/27/2026 Advisory disclosed
05/27/2026 +0 days CVE reserved
05/27/2026 +0 days VulDB entry created
05/27/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: cf432879a14568c4bb44cd2f9e5a9bd0e168edc1
Status: Confirmed

CVE: CVE-2026-49103 (🔒)
GCVE (CVE): GCVE-0-2026-49103
GCVE (VulDB): GCVE-100-366419
EUVD: 🔒

Entryinfo

Created: 05/27/2026 19:01
Updated: 05/27/2026 20:13
Changes: 05/27/2026 19:01 (70), 05/27/2026 20:13 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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