CVE-2026-49978

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 74% 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, nvd
Trending — 3 sources updated this weekElevated
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: Elevated riskExposed: 0

A fix is available — apply it.

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify IN_PLACE sanitization could skip shadow contents attached to an element inside .content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive and execute when an application cloned and inserted the sanitized template. This issue is fixed in version 3.4.7.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity61% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

June 15, 2026

Last Modified

July 21, 2026

Advisory Details (2)

Auto-updated Jul 15, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github.
github Patch Available🟡 PoC Available

DOMPurify IN_PLACE Sanitization Bypass via Attached Shadow Root Inside <template>.content · Advisory · cure53/DOMPurify · GitHub

https://github.com/cure53/DOMPurify/security/advisories/GHSA-rp9w-3fw7-7cwq
github_release Patch Available

DOMPurify 3.4.7

Patch available: cure53/DOMPurify 3.4.7

https://github.com/cure53/DOMPurify/releases/tag/3.4.7

Vendor Advisories for CVE-2026-49978(20)

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

Patch Availability(20)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatdompurify2026-08-12redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17855179332026-08-12redhat
redhatcontainer-native-virtualization/kubevirt-console-plugin-rhel9:17863275702026-08-11redhat
redhatcontainer-native-virtualization/kubevirt-console-plugin-rhel9:17863283462026-08-11redhat
redhatrhdh/rhdh-hub-rhel9:17859728432026-08-10redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17853541282026-08-04redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17852300412026-08-04redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17853491662026-08-04redhat
redhatopenshift-service-mesh/kiali-rhel9:17848067082026-08-03redhat
redhatrhdh/rhdh-hub-rhel9:17854116522026-08-03redhat
redhatopenshift-service-mesh/kiali-rhel9:17848063262026-08-03redhat
redhatadvanced-cluster-security/rhacs-main-rhel8:17854132102026-07-30redhat
redhatadvanced-cluster-security/rhacs-main-rhel9:17854158682026-07-30redhat
redhatadvanced-cluster-security/rhacs-main-rhel8:17854209592026-07-30redhat
redhatrhdh/red-hat-developer-hub-backstage-plugin-lightspeed:17853334132026-07-29redhat
redhatcontainer-native-virtualization/kubevirt-console-plugin-rhel9:17848053222026-07-27redhat
redhatcontainer-native-virtualization/kubevirt-console-plugin:17847105942026-07-27redhat
redhatcontainer-native-virtualization/kubevirt-console-plugin-rhel9:17847416862026-07-27redhat
redhatcontainer-native-virtualization/kubevirt-console-plugin-rhel9:17846341282026-07-22redhat
redhatansible-automation-platform/automation-portal:17846229512026-07-21redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
node-dompurify2.4.1+dfsg+~2.4.0-1 ... 3.4.5+dfsg-1 (15 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
node-dompurify3.1.7+dfsg+~3.0.5-2 ... 3.4.5+dfsg-1 (9 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
node-dompurify3.1.7+dfsg+~3.0.5-2 ... 3.4.5+dfsg-1 (8 versions)3.4.12+dfsg-1—
npm(1)
PackageVulnerable rangeFixed inDependents
dompurify—3.4.7—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 16× in last 7d / 72× 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. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 11:32 UTCEG score recompute
  3. 2026-08-20 11:32 UTCVendor advisory
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 13:14 UTCEG score recompute
  6. 2026-08-19 13:14 UTCVendor advisory
  7. 2026-08-18 13:48 UTCEPSS rescore
  8. 2026-08-17 13:47 UTCEPSS rescore
  9. 2026-08-16 22:55 UTCEG score recompute
  10. 2026-08-16 22:55 UTCVendor advisory
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 02:14 UTCEPSS rescore
  13. 2026-08-16 00:39 UTCVendor advisory
  14. 2026-08-15 02:22 UTCEG score recompute
  15. 2026-08-15 02:22 UTCVendor advisory
  16. 2026-08-15 01:30 UTCEPSS rescore
  17. 2026-08-14 04:06 UTCEG score recompute
  18. 2026-08-14 04:06 UTCVendor advisory
  19. 2026-08-13 22:00 UTCEPSS rescore
  20. 2026-08-13 05:50 UTCEG score recompute
  21. 2026-08-13 05:50 UTCVendor advisory
  22. 2026-08-12 13:51 UTCEPSS rescore
  23. 2026-08-12 07:33 UTCEG score recompute
  24. 2026-08-12 07:33 UTCVendor advisory
  25. 2026-08-11 09:17 UTCEG score recompute
Show 60 more
  1. 2026-08-11 09:17 UTCVendor advisory
  2. 2026-08-11 00:00 UTCEPSS rescore
  3. 2026-08-10 11:01 UTCEG score recompute
  4. 2026-08-10 11:01 UTCVendor advisory
  5. 2026-08-09 13:46 UTCEPSS rescore
  6. 2026-08-09 12:45 UTCEG score recompute
  7. 2026-08-09 12:45 UTCVendor advisory
  8. 2026-08-08 16:37 UTCEPSS rescore
  9. 2026-08-08 14:29 UTCEG score recompute
  10. 2026-08-08 14:29 UTCVendor advisory
  11. 2026-08-07 16:12 UTCVendor advisory
  12. 2026-08-06 17:56 UTCEG score recompute
  13. 2026-08-06 17:56 UTCVendor advisory
  14. 2026-08-06 13:47 UTCEPSS rescore
  15. 2026-08-05 19:41 UTCEG score recompute
  16. 2026-08-05 19:41 UTCVendor advisory
  17. 2026-08-05 19:17 UTCEPSS rescore
  18. 2026-08-04 15:42 UTCEG score recompute
  19. 2026-08-04 15:42 UTCVendor advisory
  20. 2026-08-04 15:10 UTCEPSS rescore
  21. 2026-08-04 10:39 UTCEPSS rescore
  22. 2026-08-03 08:57 UTCVendor advisory
  23. 2026-08-02 07:07 UTCEG score recompute
  24. 2026-08-02 07:07 UTCVendor advisory
  25. 2026-08-02 02:27 UTCEPSS rescore
  26. 2026-08-01 08:50 UTCEG score recompute
  27. 2026-08-01 08:50 UTCVendor advisory
  28. 2026-08-01 04:16 UTCEPSS rescore
  29. 2026-07-31 04:31 UTCEG score recompute
  30. 2026-07-31 04:31 UTCVendor advisory
  31. 2026-07-30 16:28 UTCEPSS rescore
  32. 2026-07-30 05:11 UTCEG score recompute
  33. 2026-07-30 05:11 UTCVendor advisory
  34. 2026-07-30 01:30 UTCEPSS rescore
  35. 2026-07-29 03:24 UTCEG score recompute
  36. 2026-07-29 03:24 UTCVendor advisory
  37. 2026-07-28 15:37 UTCEPSS rescore
  38. 2026-07-27 18:31 UTCEG score recompute
  39. 2026-07-27 18:31 UTCVendor advisory
  40. 2026-07-26 20:13 UTCEG score recompute
  41. 2026-07-26 20:13 UTCVendor advisory
  42. 2026-07-26 14:54 UTCEPSS rescore
  43. 2026-07-25 14:18 UTCEPSS rescore
  44. 2026-07-24 14:18 UTCEPSS rescore
  45. 2026-07-23 14:18 UTCEPSS rescore
  46. 2026-07-23 03:18 UTCEG score recompute▼ 0.20
  47. 2026-07-22 14:08 UTCEPSS rescore
  48. 2026-07-21 21:19 UTCNVD updateCVSS v3 → 6.1
  49. 2026-07-21 15:25 UTCEPSS rescore
  50. 2026-07-20 17:08 UTCEPSS rescore
  51. 2026-07-19 14:31 UTCEPSS rescore
  52. 2026-07-19 14:31 UTCEPSS rescore
  53. 2026-07-19 02:29 UTCEPSS rescore
  54. 2026-07-18 10:04 UTCEPSS rescore
  55. 2026-07-16 17:03 UTCEPSS rescore
  56. 2026-07-15 16:57 UTCEPSS rescore
  57. 2026-07-15 16:57 UTCEPSS rescore
  58. 2026-07-14 20:33 UTCEG score recompute▲ 6.30
  59. 2026-07-14 20:30 UTCMITRE cvelistV5CVSS v3 → 6.3 · CVSS v4 → 6.3
  60. 2026-06-15 20:12 UTCEG score recompute

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-49978?
CVE-2026-49978 is a medium vulnerability published on June 15, 2026. DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify IN_PLACE sanitization could skip shadow contents attached to an element inside <template>.content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to…
When was CVE-2026-49978 disclosed?
CVE-2026-49978 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49978 actively exploited?
CVE-2026-49978 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 73.6% of all scored CVEs.
What is the CVSS score of CVE-2026-49978?
CVE-2026-49978 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-49978?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49978, 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

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