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
Elevated
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.1Exploit: Elevated riskExposed services: Not assessed

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
6.1MEDIUMmedium confidence
EG Risk
43
EG Risk 43/100

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%
EPSS PROB
0.4%
EPSS %ILE
32nd
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(25)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatdompurify2026-09-10redhat
redhatrhoai/odh-mod-arch-model-registry-rhel9:17883121572026-09-08redhat
redhatdevspaces/openvsx-rhel9:17877591452026-09-01redhat
redhatrhoai/odh-mod-arch-model-registry-rhel9:17872506172026-08-27redhat
redhatapicurio/apicurio-registry-ui-rhel92026-08-25redhat
redhatrh-podman-desktop-0:1.1.2-1.el10_22026-08-20redhat
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-rhel9:17853491662026-08-04redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17853541282026-08-04redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17852300412026-08-04redhat
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-rhel8:17854209592026-07-30redhat
redhatadvanced-cluster-security/rhacs-main-rhel8:17854132102026-07-30redhat
redhatadvanced-cluster-security/rhacs-main-rhel9:17854158682026-07-30redhat
redhatrhdh/red-hat-developer-hub-backstage-plugin-lightspeed:17853334132026-07-29redhat
redhatcontainer-native-virtualization/kubevirt-console-plugin:17847105942026-07-27redhat
redhatcontainer-native-virtualization/kubevirt-console-plugin-rhel9:17848053222026-07-27redhat
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 rangeFix by version rangeDependents
node-dompurify2.4.1+dfsg+~2.4.0-1 ... 3.4.5+dfsg-1 (18 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
node-dompurify3.1.7+dfsg+~3.0.5-2 ... 3.4.5+dfsg-1 (12 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
node-dompurify3.1.7+dfsg+~3.0.5-2 ... 3.4.5+dfsg-1 (8 versions)
  • every version up to 3.4.12+dfsg-1: fixed in 3.4.12+dfsg-1
—
npm(1)
PackageVulnerable rangeFix by version rangeDependents
dompurify—
  • every version up to 3.4.7: fixed in 3.4.7
—

Weakness Classification(1)

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

Additional Vendor Advisories

(9)

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 6× in last 7d / 22× 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.

Showing the most recent 100 of 127 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-03 14:25 UTCEPSS rescore
  3. 2026-10-03 07:39 UTCOSV refresh
  4. 2026-10-01 19:50 UTCEPSS rescore
  5. 2026-09-30 15:03 UTCEPSS rescore
  6. 2026-09-28 13:51 UTCEPSS rescore
  7. 2026-09-27 13:48 UTCEPSS rescore
  8. 2026-09-26 15:59 UTCEPSS rescore
  9. 2026-09-26 00:27 UTCEPSS rescore
  10. 2026-09-23 17:53 UTCEPSS rescore
  11. 2026-09-20 20:16 UTCEPSS rescore
  12. 2026-09-18 19:28 UTCEPSS rescore
  13. 2026-09-16 14:08 UTCEPSS rescore
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-14 03:42 UTCEG score recompute
  16. 2026-09-14 03:42 UTCVendor advisory
  17. 2026-09-13 16:47 UTCEPSS rescore
  18. 2026-09-11 14:53 UTCEPSS rescore
  19. 2026-09-10 09:35 UTCEPSS rescore
  20. 2026-09-08 22:01 UTCEPSS rescore
  21. 2026-09-07 16:01 UTCEPSS rescore
  22. 2026-09-06 13:47 UTCEPSS rescore
  23. 2026-09-04 05:06 UTCEPSS rescore
  24. 2026-09-02 14:12 UTCEPSS rescore
  25. 2026-09-01 13:54 UTCEPSS rescore
Show 75 more
  1. 2026-09-01 04:40 UTCEPSS rescore
  2. 2026-08-30 22:58 UTCEG score recompute
  3. 2026-08-30 22:58 UTCVendor advisory
  4. 2026-08-30 19:17 UTCEPSS rescore
  5. 2026-08-30 01:22 UTCEPSS rescore
  6. 2026-08-28 21:41 UTCEPSS rescore
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-26 14:46 UTCEPSS rescore
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-24 23:33 UTCEG score recompute
  11. 2026-08-24 23:33 UTCVendor advisory
  12. 2026-08-23 09:44 UTCEG score recompute
  13. 2026-08-23 09:44 UTCVendor advisory
  14. 2026-08-23 00:19 UTCEPSS rescore
  15. 2026-08-21 23:49 UTCEPSS rescore
  16. 2026-08-21 09:53 UTCEG score recompute
  17. 2026-08-21 09:53 UTCVendor advisory
  18. 2026-08-20 22:55 UTCEPSS rescore
  19. 2026-08-20 11:32 UTCEG score recompute
  20. 2026-08-20 11:32 UTCVendor advisory
  21. 2026-08-19 17:04 UTCEPSS rescore
  22. 2026-08-19 13:14 UTCEG score recompute
  23. 2026-08-19 13:14 UTCVendor advisory
  24. 2026-08-18 13:48 UTCEPSS rescore
  25. 2026-08-17 13:47 UTCEPSS rescore
  26. 2026-08-16 22:55 UTCEG score recompute
  27. 2026-08-16 22:55 UTCVendor advisory
  28. 2026-08-16 14:56 UTCEPSS rescore
  29. 2026-08-16 02:14 UTCEPSS rescore
  30. 2026-08-16 00:39 UTCVendor advisory
  31. 2026-08-15 02:22 UTCEG score recompute
  32. 2026-08-15 02:22 UTCVendor advisory
  33. 2026-08-15 01:30 UTCEPSS rescore
  34. 2026-08-14 04:06 UTCEG score recompute
  35. 2026-08-14 04:06 UTCVendor advisory
  36. 2026-08-13 22:00 UTCEPSS rescore
  37. 2026-08-13 05:50 UTCEG score recompute
  38. 2026-08-13 05:50 UTCVendor advisory
  39. 2026-08-12 13:51 UTCEPSS rescore
  40. 2026-08-12 07:33 UTCEG score recompute
  41. 2026-08-12 07:33 UTCVendor advisory
  42. 2026-08-11 09:17 UTCEG score recompute
  43. 2026-08-11 09:17 UTCVendor advisory
  44. 2026-08-11 00:00 UTCEPSS rescore
  45. 2026-08-10 11:01 UTCEG score recompute
  46. 2026-08-10 11:01 UTCVendor advisory
  47. 2026-08-09 13:46 UTCEPSS rescore
  48. 2026-08-09 12:45 UTCEG score recompute
  49. 2026-08-09 12:45 UTCVendor advisory
  50. 2026-08-08 16:37 UTCEPSS rescore
  51. 2026-08-08 14:29 UTCEG score recompute
  52. 2026-08-08 14:29 UTCVendor advisory
  53. 2026-08-07 16:12 UTCVendor advisory
  54. 2026-08-06 17:56 UTCEG score recompute
  55. 2026-08-06 17:56 UTCVendor advisory
  56. 2026-08-06 13:47 UTCEPSS rescore
  57. 2026-08-05 19:41 UTCEG score recompute
  58. 2026-08-05 19:41 UTCVendor advisory
  59. 2026-08-05 19:17 UTCEPSS rescore
  60. 2026-08-04 15:42 UTCEG score recompute
  61. 2026-08-04 15:42 UTCVendor advisory
  62. 2026-08-04 15:10 UTCEPSS rescore
  63. 2026-08-04 10:39 UTCEPSS rescore
  64. 2026-08-03 08:57 UTCVendor advisory
  65. 2026-08-02 07:07 UTCEG score recompute
  66. 2026-08-02 07:07 UTCVendor advisory
  67. 2026-08-02 02:27 UTCEPSS rescore
  68. 2026-08-01 08:50 UTCEG score recompute
  69. 2026-08-01 08:50 UTCVendor advisory
  70. 2026-08-01 04:16 UTCEPSS rescore
  71. 2026-07-31 04:31 UTCEG score recompute
  72. 2026-07-31 04:31 UTCVendor advisory
  73. 2026-07-30 16:28 UTCEPSS rescore
  74. 2026-07-30 05:11 UTCEG score recompute
  75. 2026-07-30 05:11 UTCVendor advisory

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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 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 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-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?
A fix for CVE-2026-49978 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-49978 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-49978

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