CVE-2026-84370

HIGHPre-NVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 73% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

SVGO, short for SVG Optimizer, is a Node.js library and command-line application for optimizing SVG files. From version 1.0.0 until versions 2.8.4, 3.3.5, and 4.1.0, the opt-in removeScripts plugin, named removeScriptElement in versions 2 and 3, incompletely filters executable links in plugins/removeScripts.js and lib/svgo/tools.js. The plugin does not recognize namespace-prefixed SVG anchor elements such as svg:a with href or namespaced *:href values, and it does not remove ASCII tab, line-feed, or carriage-return characters before checking URL schemes. Browsers remove those characters before parsing a scheme, allowing an executable link to pass the plugin's check. When an application processes attacker-controlled SVG input and serves the result in an active browser context, a victim who activates the surviving link can execute script in the SVG's origin, expose data, modify content, or perform actions as the victim. This issue is fixed in versions 2.8.4, 3.3.5, and 4.1.0.

CVSS v3
8.2
EG Score
8.2(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity82% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 9, 2026

Advisory Details (10)

Auto-updated Sep 1, 2026
Patch available. Sources: github_commit, github_release, github, github_pr.
github_release Patch Available

v4.1.0

Patch available: svg/svgo v4.1.0

https://github.com/svg/svgo/releases/tag/v4.1.0
github_release Patch Available

v3.3.5

Patch available: svg/svgo v3.3.5

https://github.com/svg/svgo/releases/tag/v3.3.5
github_release Patch Available

v2.8.4

Patch available: svg/svgo v2.8.4

https://github.com/svg/svgo/releases/tag/v2.8.4
github_commit Patch Available

commit 994a9f00d79d (svg/svgo)

Patch available: svg/svgo v3.3.5 (contains commit 994a9f00d79d)

https://github.com/svg/svgo/commit/994a9f00d79ddec68ce19a1ce9eb8ca08d747e4f
github_commit Patch Available

commit 3db3ef33e409 (svg/svgo)

Patch available: svg/svgo v4.1.0 (contains commit 3db3ef33e409)

https://github.com/svg/svgo/commit/3db3ef33e409a0bc0fdaf255e46c908b00e93bc2
github_commit Patch Available

commit 0557385564a5 (svg/svgo)

Patch available: svg/svgo v2.8.4 (contains commit 0557385564a5)

https://github.com/svg/svgo/commit/0557385564a5c6c11d76cd934a6cff94451e532c
github_pr Patch Available

fix(removeScriptElement): backport security hardening to v2

Patch available: svg/svgo v2.8.4 (PR #2272 merged 2026-08-24)

https://github.com/svg/svgo/pull/2272
github_pr Patch Available

fix(removeScriptElement): backport security hardening to v3

Patch available: svg/svgo v3.3.5 (PR #2269 merged 2026-08-24)

https://github.com/svg/svgo/pull/2269
github_pr Patch Available

fix(removeScripts): handle anchor URL bypasses

Patch available: svg/svgo v4.1.0 (PR #2268 merged 2026-08-24)

https://github.com/svg/svgo/pull/2268
github Patch Available

removeScripts allows executable links through namespace and control-character bypasses · Advisory · svg/svgo · GitHub

https://github.com/svg/svgo/security/advisories/GHSA-w27v-7q3p-w38r

Vendor Advisories for CVE-2026-84370(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
svgo—4.1.0—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 34× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-18 21:58 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 20:40 UTCEG score recompute
  4. 2026-09-17 19:32 UTCEPSS rescore
  5. 2026-09-16 18:38 UTCEG score recompute
  6. 2026-09-16 14:09 UTCEPSS rescore
  7. 2026-09-16 05:33 UTCEG score recompute
  8. 2026-09-16 05:15 UTCEPSS rescore
  9. 2026-09-15 04:16 UTCEG score recompute
  10. 2026-09-15 03:12 UTCEPSS rescore
  11. 2026-09-15 03:12 UTCEPSS rescore
  12. 2026-09-14 02:58 UTCEG score recompute
  13. 2026-09-13 01:42 UTCEG score recompute
  14. 2026-09-12 00:25 UTCEG score recompute
  15. 2026-09-11 14:53 UTCEPSS rescore
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 11:46 UTCEG score recompute
  18. 2026-09-10 09:49 UTCEG score recompute
  19. 2026-09-08 23:18 UTCEG score recompute
  20. 2026-09-08 22:01 UTCEPSS rescore
  21. 2026-09-07 20:01 UTCEG score recompute
  22. 2026-09-06 18:42 UTCEG score recompute
  23. 2026-09-06 13:48 UTCEPSS rescore
  24. 2026-09-05 17:25 UTCEG score recompute
  25. 2026-09-05 15:31 UTCEPSS rescore
Show 9 more
  1. 2026-09-04 16:03 UTCEG score recompute
  2. 2026-09-04 05:07 UTCEPSS rescore
  3. 2026-09-04 03:23 UTCEG score recompute
  4. 2026-09-04 02:34 UTCEG score recompute
  5. 2026-09-02 22:43 UTCEG score recompute
  6. 2026-09-02 14:12 UTCEPSS rescore
  7. 2026-09-01 21:26 UTCEG score recompute
  8. 2026-09-01 20:53 UTCEG score recompute
  9. 2026-09-01 20:52 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84370?
CVE-2026-84370 is a high vulnerability published on September 1, 2026. SVGO, short for SVG Optimizer, is a Node.js library and command-line application for optimizing SVG files. From version 1.0.0 until versions 2.8.4, 3.3.5, and 4.1.0, the opt-in removeScripts plugin, named removeScriptElement in versions 2 and 3, incompletely filters executable links in…
When was CVE-2026-84370 disclosed?
CVE-2026-84370 was first published in the National Vulnerability Database on September 1, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84370 actively exploited?
CVE-2026-84370 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 73.0% of all scored CVEs.
What is the CVSS score of CVE-2026-84370?
CVE-2026-84370 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-84370?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84370, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-84370

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