ByteOS Network

Vulnerability Details :

CVE-2026-42563

Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa

Published At-10 Jun, 2026 | 21:47

Updated At-10 Jun, 2026 | 21:47

Dulwich Vulnerable to Command Injection via Merge Driver Path

Dulwich is a pure-Python implementation of the Git file formats and protocols. Starting in version 0.24.0 and prior to version 1.2.5, Dulwich's `ProcessMergeDriver` substitutes the file path (from the git tree, controllable by an attacker via a malicious branch) into the merge driver command via the `%P` placeholder and executes it with `subprocess.run(..., shell=True)`. An attacker who can cause a victim to merge an untrusted branch can achieve arbitrary command execution by crafting malicious file paths. Version 1.2.5 fixes the issue.

▼Common Vulnerabilities and Exposures (CVE)

cve.org

Assigner:GitHub_M

Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa

Published At:10 Jun, 2026 | 21:47

Updated At:10 Jun, 2026 | 21:47

▼CVE Numbering Authority (CNA)

Dulwich Vulnerable to Command Injection via Merge Driver Path

Affected Products

Vendor

jelmer

Product

dulwich

Versions

Affected

>= 0.24.0, < 1.2.5

Problem Types

Type	CWE ID	Description
CWE	CWE-78	CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Type: CWE

CWE ID: CWE-78

Description: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Metrics

Version	Base score	Base severity	Vector
4.0	7.7	HIGH	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Version: 4.0

Base score: 7.7

Base severity: HIGH

Vector:

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References

Hyperlink	Resource
https://github.com/jelmer/dulwich/security/advisories/GHSA-9277-mp7x-85jf	x_refsource_CONFIRM
https://github.com/jelmer/dulwich/commit/e3331b3b3a122fc313460182f928f59723580b7b	x_refsource_MISC
https://github.com/jelmer/dulwich/releases/tag/dulwich-1.2.5	x_refsource_MISC

Hyperlink: https://github.com/jelmer/dulwich/security/advisories/GHSA-9277-mp7x-85jf

Resource:

x_refsource_CONFIRM

Hyperlink: https://github.com/jelmer/dulwich/commit/e3331b3b3a122fc313460182f928f59723580b7b

Resource:

x_refsource_MISC

Hyperlink: https://github.com/jelmer/dulwich/releases/tag/dulwich-1.2.5

Resource:

x_refsource_MISC

▼National Vulnerability Database (NVD)

nvd.nist.gov

Source:security-advisories@github.com

Published At:10 Jun, 2026 | 23:16

Updated At:10 Jun, 2026 | 23:16

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	4.0	7.7	HIGH	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Type: Secondary

Version: 4.0

Base score: 7.7

Base severity: HIGH

Vector:

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE ID	Type	Source
CWE-78	Primary	security-advisories@github.com

CWE ID: CWE-78

Type: Primary

Source: security-advisories@github.com

References

Hyperlink	Source	Resource
https://github.com/jelmer/dulwich/commit/e3331b3b3a122fc313460182f928f59723580b7b	security-advisories@github.com	N/A
https://github.com/jelmer/dulwich/releases/tag/dulwich-1.2.5	security-advisories@github.com	N/A
https://github.com/jelmer/dulwich/security/advisories/GHSA-9277-mp7x-85jf	security-advisories@github.com	N/A

Hyperlink: https://github.com/jelmer/dulwich/commit/e3331b3b3a122fc313460182f928f59723580b7b

Source: security-advisories@github.com

Resource: N/A

Hyperlink: https://github.com/jelmer/dulwich/releases/tag/dulwich-1.2.5

Source: security-advisories@github.com

Resource: N/A

Hyperlink: https://github.com/jelmer/dulwich/security/advisories/GHSA-9277-mp7x-85jf

Source: security-advisories@github.com

Resource: N/A

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CVE-2026-42563

Credits

Dulwich Vulnerable to Command Injection via Merge Driver Path

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