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CVE-2026-104861

7.5 · HIGH

probe-image-size gets image dimensions without downloading the entire file.

Published Oct 2, 2026CWE-400EPSS 0.43%

Overview

CVE-2026-104861 is a high-severity vulnerability. It was published on October 2, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/nodeca/probe-image-size/commit/60cc96ac0b671e79e328213d0a8e831312b09e84GitHubgithub.com/nodeca/probe-image-size/commit/9b74656d6f973cc59ea2ab1375c0d88390a402adGitHubgithub.com/nodeca/probe-image-size/commit/c032aefabdecf5cb50548ab9ba175db56353078fGitHubgithub.com/nodeca/probe-image-size/releases/tag/7.4.0GitHubgithub.com/nodeca/probe-image-size/security/advisories/GHSA-gjj5-9665-rwrcGitHubgithub.com/nodeca/probe-image-size/security/advisories/GHSA-gjj5-9665-rwrc

How CyberStrike helps

Frequently asked questions

What is CVE-2026-104861?

CVE-2026-104861 is a high-severity vulnerability. It was published on October 2, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-104861?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-104861?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-104861?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-104861 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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