Jan De Dobbeleer Oh My Posh up to 29.35.0 Writer src/terminal/writer.go write s injection

Summaryinfo

A vulnerability labeled as critical has been found in Jan De Dobbeleer Oh My Posh up to 29.35.0. This affects the function write of the file src/terminal/writer.go of the component Writer. Executing a manipulation of the argument s can lead to injection. The identification of this vulnerability is CVE-2026-73506. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Jan De Dobbeleer Oh My Posh up to 29.35.0. It has been declared as critical. This vulnerability affects the function write of the file src/terminal/writer.go of the component Writer. The manipulation of the argument s with an unknown input leads to a injection vulnerability. The CWE definition for the vulnerability is CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Oh My Posh is the most customisable and low-latency cross platform/shell prompt renderer. Prior to 29.35.1, write(s rune) in src/terminal/writer.go emitted attacker-controlled current directory names and Git metadata, including Commit.Subject, Commit.Author.Name, Commit.Author.Email, and RawUpstreamURL, without removing C0/C1 terminal control characters such as ESC, BEL, CSI, and OSC, allowing terminal escape sequence injection during prompt rendering that could overwrite the clipboard, spoof the prompt or screen, manipulate the window title, or disrupt the terminal. This issue is fixed in version 29.35.1.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-73506 since 08/12/2026. The exploitation appears to be easy. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1055.

Upgrading to version 29.35.1 eliminates this vulnerability.

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Productinfo

Vendor

• Jan De Dobbeleer

Name

• Oh My Posh

Version

• 29.0
• 29.1
• 29.2
• 29.3
• 29.4
• 29.5
• 29.6
• 29.7
• 29.8
• 29.9
• 29.10
• 29.11
• 29.12
• 29.13
• 29.14
• 29.15
• 29.16
• 29.17
• 29.18
• 29.19
• 29.20
• 29.21
• 29.22
• 29.23
• 29.24
• 29.25
• 29.26
• 29.27
• 29.28
• 29.29
• 29.30
• 29.31
• 29.32
• 29.33
• 29.34
• 29.35.0

CPE 2.3info

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CPE 2.2info

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