DevSpace up to 6.3.21 Tar Entry path traversal

Summaryinfo

A vulnerability was found in DevSpace up to 6.3.21 and classified as critical. Affected by this vulnerability is an unknown functionality of the component Tar Entry Handler. Executing a manipulation can lead to path traversal. This vulnerability is handled as CVE-2026-91200. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in DevSpace up to 6.3.21. This vulnerability affects an unknown code of the component Tar Entry Handler. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

DevSpace through 6.3.21 fails to reject parent-directory segments in tar entry names from the in-pod sync stream. Attackers operating a malicious container can stream tar entries with traversal sequences to write arbitrary files on the developer workstation, enabling code execution.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-91200 since 09/14/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/15/2026). The MITRE ATT&CK project declares the attack technique as T1006.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-78209). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• DevSpace

Version

• 6.3.0
• 6.3.1
• 6.3.2
• 6.3.3
• 6.3.4
• 6.3.5
• 6.3.6
• 6.3.7
• 6.3.8
• 6.3.9
• 6.3.10
• 6.3.11
• 6.3.12
• 6.3.13
• 6.3.14
• 6.3.15
• 6.3.16
• 6.3.17
• 6.3.18
• 6.3.19
• 6.3.20
• 6.3.21

CPE 2.3info

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CPE 2.2info

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CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

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Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

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