nodeca probe-image-size up to 7.3.x SVG Parser lib/parse_sync/svg.js probe.sync resource consumption

Summaryinfo

A vulnerability classified as problematic was found in nodeca probe-image-size up to 7.3.x. This vulnerability affects the function probe.sync of the file lib/parse_sync/svg.js of the component SVG Parser. The manipulation results in resource consumption. This vulnerability is identified as CVE-2026-104861. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in nodeca probe-image-size up to 7.3.x. It has been classified as problematic. Affected is the function probe.sync of the file lib/parse_sync/svg.js of the component SVG Parser. 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. CVE summarizes:

probe-image-size gets image dimensions without downloading the entire file. Prior to 7.4.0, lib/parse_sync/svg.js and lib/parse_stream/svg.js use the searching regular expression /<[-_.:a-zA-Z0-9][^>]*>/, which repeatedly scans to the end of input when attacker-controlled data contains many less-than characters without a closing greater-than character. The synchronous parser converts and scans the full supplied buffer without an input cap, while the streaming parser reparses the complete accumulated SVG prefix for every received chunk. The probe.sync(), probe(stream), and probe(url) entry points can therefore block the Node.js event loop at full CPU, and attacker-controlled chunking can amplify the streaming cost. This issue is fixed in version 7.4.0.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-104861 since 10/02/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 7.4.0 eliminates this vulnerability.

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Productinfo

Vendor

• nodeca

Name

• probe-image-size

Version

• 7.0
• 7.1
• 7.2
• 7.3

Website

• Product: https://github.com/nodeca/probe-image-size/

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