sagredo qmail up to 2026.04.06 qmail-remote.c tls_quit os command injection

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability has been found in sagredo qmail up to 2026.04.06 and classified as critical. This affects the function tls_quit of the file qmail-remote.c. This manipulation causes os command injection. This vulnerability is tracked as CVE-2026-41113. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in sagredo qmail up to 2026.04.06 and classified as critical. Affected by this vulnerability is the function tls_quit of the file qmail-remote.c. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

sagredo qmail before 2026.04.07 allows tls_quit remote code execution because of popen in notlshosts_auto in qmail-remote.c.

The advisory is shared at blog.calif.io. This vulnerability is known as CVE-2026-41113 since 04/17/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1202 for this issue.

Upgrading to version 2026.04.07 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 749f607f6885e3d01b36f2647d7a1db88f1ef741 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-2026-23321). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.1
CNA Vector (MITRE): 🔒

CVSSv2info

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

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
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: qmail 2026.04.07
Patch: 749f607f6885e3d01b36f2647d7a1db88f1ef741

Timelineinfo

04/17/2026 Advisory disclosed
04/17/2026 +0 days CVE reserved
04/17/2026 +0 days VulDB entry created
04/19/2026 +2 days VulDB entry last update

Sourcesinfo

Advisory: blog.calif.io
Status: Confirmed

CVE: CVE-2026-41113 (🔒)
GCVE (CVE): GCVE-0-2026-41113
GCVE (VulDB): GCVE-100-357997
EUVD: 🔒

Entryinfo

Created: 04/17/2026 06:33
Updated: 04/19/2026 13:54
Changes: 04/17/2026 06:33 (69), 04/19/2026 13:54 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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