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VulnerabilityPublished Updated

CVE-2026-29074: svg svgo · XML Entity Expansion

Affects svg svgoSource CVE Database V5

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Not known to be exploited · CVSS 7.5 High : upgrade to 3.3.3 or 2.8.1 soon.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 50% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 3.3.3, 2.8.1, 4.0.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 Mar 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade svgo to 3.3.3 or 2.8.1; svgo to 4.0.1, 3.3.3 or 2.8.1.

Affected software

ProductAffectedFixed in
svgsvgoAffected
  • >=2.1.0 <2.8.1
  • >=3.0.0 <3.3.3
  • =4.0.0
Fixed in
  • 3.3.3
  • 2.8.1
npmsvgopkg:npm/svgoOther threatsAffected
  • >=2.1.0 <2.8.1
  • >=3.0.0 <3.3.3
  • <4.0.1
Fixed in
  • 2.8.1
  • 3.3.3
  • 4.0.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Official patches are available in SVGO versions 2.8.1, 3.3.3, and 4.0.1. Users should upgrade to these or later versions to remediate the vulnerability. The Red Hat advisory notes that no alternative mitigations meet their criteria for ease of use and applicability, so upgrading is the recommended action.

Description

SVGO, short for SVG Optimizer, is a Node.js library and command-line application for optimizing SVG files. From version 2.1.0 to before version 2.8.1, from version 3.0.0 to before version 3.3.3, and before version 4.0.1, SVGO accepts XML with custom entities, without guards against entity expansion or recursion. This can result in a small XML file (811 bytes) stalling the application and even crashing the Node.js process with JavaScript heap out of memory. This issue has been patched in versions 2.8.1, 3.3.3, and 4.0.1.

References

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