Penpot up to 2.17.x Chunked Media Upload RPC resource consumption

Summaryinfo

A vulnerability identified as problematic has been detected in Penpot up to 2.17.x. The affected element is an unknown function of the component Chunked Media Upload RPC. Performing a manipulation results in resource consumption. This vulnerability was named CVE-2026-105686. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Penpot up to 2.17.x. This affects some unknown functionality of the component Chunked Media Upload RPC. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

Penpot is an open-source design and prototyping platform. Prior to 2.18.0, the chunked media upload RPC validates that a chunk index is in range but neither rejects an already stored index nor replaces its previous object. An authenticated user can repeatedly upload the same valid index, causing each successful request to allocate another temporary object and increasing stored bytes beyond the upload session's declared logical size. Assembly detects the inconsistent chunk count only after allocation. This issue is fixed in version 2.18.0.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-105686 since 10/05/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 2.18.0 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• Penpot

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17

Website

• Product: https://github.com/penpot/penpot/

CPE 2.3info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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