probe-image-size: Quadratic-time Denial of Service in the SVG Parser

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-104861
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-02 18:17:02 UTC
Updated2026-10-02 19:16:41 UTC
Descriptionprobe-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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-400 | CWE-1333 | CWE-400 CWE-400: Uncontrolled Resource Consumption | CWE-1333 CWE-1333: Inefficient Regular Expression Complexity

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Nodeca Probe-image-size affected < 7.4.0 Not specified

References

ReferenceSourceLinkTags
github.com/nodeca/probe-image-size/commit/9b74656d6f973cc59ea2ab1375c0d8... [email protected] github.com
github.com/nodeca/probe-image-size/security/advisories/GHSA-gjj5-9665-rwrc 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/nodeca/probe-image-size/commit/60cc96ac0b671e79e328213d0a8e83... [email protected] github.com
github.com/nodeca/probe-image-size/commit/c032aefabdecf5cb50548ab9ba175d... [email protected] github.com
github.com/nodeca/probe-image-size/releases/tag/7.4.0 [email protected] github.com
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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