CVE-2026-104861— probe-image-size: Quadratic-time Denial of Service in the SVG Parser
Quick assessment
Affected
nodeca probe-image-size
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
probe-image-size 可在不下载完整文件的情况下获取图像尺寸。在 7.4.0 版本之前， 和 中使用了正则表达式 。当攻击者控制的数据中包含大量没有对应闭合大于号（ ）的小于号（ ）时，该正则表达式会反复扫描至输入数据的末尾。同步解析器在未设置输入上限的情况下，会对完整提供的缓冲区进行转换和扫描；而流式解析器则会对每次接收到的数据块，重新解析已累积的全部 SVG 前缀。因此， 、 和 这些入口点可能导致 Node.js 事件循环在 CPU 满载的情况下被阻塞，并且攻击者控制的数据分块方式可能进一步放大流
Possible ATT&CK Techniques 1 AI
T1499.002 · Service Exhaustion FloodAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| nodeca | probe-image-size | < 7.4.0 |
affected |
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-104861
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
probe-image-size: Quadratic-time Denial of Service in the SVG Parser
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| nodeca | probe-image-size | < 7.4.0 | - |
|
II. Public POCs for CVE-2026-104861
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-104861
请登录查看更多情报信息。
Patches & Fixes for CVE-2026-104861 (2)
Vendor Advisories for CVE-2026-104861 (1)
Vendor Pages for CVE-2026-104861 (1)
-
🔗 Release 7.4.0 · nodeca/probe-image-size · GitHub x_refsource_MISC
IV. Related Vulnerabilities
Same vendor: nodeca
-
CVE-2026-84375
js-yaml: maxTotalMergeKeys does not limit CPU use for empty -
CVE-2026-73643
js-yaml: Exponential parsing time in the flow collections le -
CVE-2026-59868
js-yaml: YAML merge-key chains can force quadratic CPU consu -
CVE-2026-59869
js-yaml: YAML merge-key chains can force quadratic CPU consu -
CVE-2026-59870
js-yaml quadratic-complexity denial of service via YAML11_SC
Same weakness: CWE-400
-
CVE-2026-104844
PostCSS: Quadratic complexity in flat selector parsing allow -
CVE-2026-95512
Freetype: freetype: denial of service via repeated subroutin -
CVE-2026-103760
Mooncake transfer engine through 0.3.13.post1 Denial of Serv -
CVE-2026-86344
389-ds-base: 389-ds-base: unauthenticated worker-thread-pool -
CVE-2026-103000
pypdf: Possible large memory usage when retrieving alphabeti
V. Comments for CVE-2026-104861
No comments yet