CVE-2026-65903

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under a secondary CVSS source (NVD's own analysis pending). 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, secondary
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: None knownExposed: 0

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

DOMPurify before 3.4.0 contains a logic error in the ADD_TAGS function where short-circuit evaluation allows forbidden tags to bypass FORBID_TAGS restrictions. Attackers can craft input containing tags listed in FORBID_TAGS that are also added via ADD_TAGS function, causing them to be retained in sanitized output.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

July 23, 2026

Last Modified

July 28, 2026

Advisory Details (2)

Auto-updated Jul 23, 2026
Patch available. Sources: github.
generic

DOMPurify before 3.4.0 ADD_TAGS Function Bypasses FORBID_TAGS | Advisories | VulnCheck

https://www.vulncheck.com/advisories/dompurify-before-add-tags-function-bypasses-forbid-tags
github Patch Available

ADD_TAGS function form bypasses FORBID_TAGS due to short-circuit evaluation · Advisory · cure53/DOMPurify · GitHub

https://github.com/cure53/DOMPurify/security/advisories/GHSA-39q2-94rc-95cp

Vendor Advisories for CVE-2026-65903(1)

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

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 (17 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
node-dompurify3.1.7+dfsg+~3.0.5-2 ... 3.4.5+dfsg-1 (11 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
node-dompurify3.1.7+dfsg+~3.0.5-2, 3.2.5+dfsg-1, 3.3.2+dfsg-1, 3.3.3+dfsg-1, 3.3.3+dfsg-23.4.1+dfsg-1—
npm(1)
PackageVulnerable rangeFixed inDependents
dompurify—3.4.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 43× 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 19:28 UTCEPSS rescore
  2. 2026-09-18 08:46 UTCEG score recompute
  3. 2026-09-17 09:17 UTCEG score recompute
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 06:48 UTCEG score recompute
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-14 16:15 UTCEG score recompute
  8. 2026-09-12 16:11 UTCEG score recompute
  9. 2026-09-11 16:45 UTCEG score recompute
  10. 2026-09-11 14:53 UTCEPSS rescore
  11. 2026-09-11 09:37 UTCEPSS rescore
  12. 2026-09-10 15:11 UTCEG score recompute
  13. 2026-09-09 08:57 UTCEG score recompute
  14. 2026-09-08 22:01 UTCEPSS rescore
  15. 2026-09-07 21:31 UTCEG score recompute
  16. 2026-09-07 16:01 UTCEPSS rescore
  17. 2026-09-06 18:55 UTCEG score recompute
  18. 2026-09-06 13:47 UTCEPSS rescore
  19. 2026-09-05 19:28 UTCEG score recompute
  20. 2026-09-05 15:31 UTCEPSS rescore
  21. 2026-09-04 13:16 UTCEG score recompute
  22. 2026-09-04 05:07 UTCEPSS rescore
  23. 2026-09-02 14:12 UTCEPSS rescore
  24. 2026-09-01 23:22 UTCEG score recompute
  25. 2026-09-01 13:54 UTCEPSS rescore
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  1. 2026-09-01 04:40 UTCEPSS rescore
  2. 2026-08-31 00:00 UTCEG score recompute
  3. 2026-08-30 19:17 UTCEPSS rescore
  4. 2026-08-30 01:22 UTCEPSS rescore
  5. 2026-08-30 00:34 UTCEG score recompute
  6. 2026-08-28 21:42 UTCEPSS rescore
  7. 2026-08-28 01:29 UTCEG score recompute
  8. 2026-08-27 01:48 UTCEG score recompute
  9. 2026-08-26 14:47 UTCEPSS rescore
  10. 2026-08-26 02:21 UTCEG score recompute
  11. 2026-08-25 13:49 UTCEPSS rescore
  12. 2026-08-25 02:55 UTCEG score recompute
  13. 2026-08-23 03:09 UTCEG score recompute
  14. 2026-08-23 00:19 UTCEPSS rescore
  15. 2026-08-22 03:42 UTCEG score recompute
  16. 2026-08-21 23:49 UTCEPSS rescore
  17. 2026-08-21 04:16 UTCEG score recompute
  18. 2026-08-20 22:56 UTCEPSS rescore
  19. 2026-08-20 04:50 UTCEG score recompute
  20. 2026-08-19 17:04 UTCEPSS rescore
  21. 2026-08-19 05:23 UTCEG score recompute
  22. 2026-08-18 13:48 UTCEPSS rescore
  23. 2026-08-18 05:35 UTCEG score recompute
  24. 2026-08-17 13:47 UTCEPSS rescore
  25. 2026-08-17 06:03 UTCEG score recompute
  26. 2026-08-16 14:56 UTCEPSS rescore
  27. 2026-08-16 06:30 UTCEG score recompute
  28. 2026-08-15 07:05 UTCEG score recompute
  29. 2026-08-15 01:30 UTCEPSS rescore
  30. 2026-08-14 07:24 UTCEG score recompute
  31. 2026-08-13 22:00 UTCEPSS rescore
  32. 2026-08-13 07:58 UTCEG score recompute
  33. 2026-08-12 13:51 UTCEPSS rescore
  34. 2026-08-12 08:32 UTCEG score recompute
  35. 2026-08-11 09:05 UTCEG score recompute
  36. 2026-08-11 00:00 UTCEPSS rescore
  37. 2026-08-10 09:39 UTCEG score recompute
  38. 2026-08-09 13:47 UTCEPSS rescore
  39. 2026-08-09 10:13 UTCEG score recompute
  40. 2026-08-08 16:37 UTCEPSS rescore
  41. 2026-08-08 10:47 UTCEG score recompute
  42. 2026-08-07 11:21 UTCEG score recompute
  43. 2026-08-06 13:47 UTCEPSS rescore
  44. 2026-08-06 11:55 UTCEG score recompute
  45. 2026-08-05 19:17 UTCEPSS rescore
  46. 2026-08-05 19:17 UTCEPSS rescore
  47. 2026-08-05 12:29 UTCEG score recompute
  48. 2026-08-04 15:10 UTCEPSS rescore
  49. 2026-08-04 12:41 UTCEG score recompute
  50. 2026-08-04 10:39 UTCEPSS rescore
  51. 2026-08-03 12:51 UTCEG score recompute
  52. 2026-08-03 10:36 UTCEPSS rescore
  53. 2026-08-02 13:09 UTCEG score recompute
  54. 2026-08-02 02:27 UTCEPSS rescore
  55. 2026-08-01 13:43 UTCEG score recompute
  56. 2026-08-01 04:16 UTCEPSS rescore
  57. 2026-07-31 14:17 UTCEG score recompute
  58. 2026-07-30 16:28 UTCEPSS rescore
  59. 2026-07-30 14:51 UTCEG score recompute
  60. 2026-07-30 01:30 UTCEPSS rescore
  61. 2026-07-28 15:59 UTCEG score recompute
  62. 2026-07-28 15:37 UTCEPSS rescore
  63. 2026-07-28 02:00 UTCEG score recompute
  64. 2026-07-27 14:14 UTCEPSS rescore
  65. 2026-07-27 02:34 UTCEG score recompute
  66. 2026-07-26 14:54 UTCEPSS rescore
  67. 2026-07-26 14:54 UTCEPSS rescore
  68. 2026-07-26 03:07 UTCEG score recompute
  69. 2026-07-25 14:18 UTCEPSS rescore
  70. 2026-07-25 14:18 UTCEPSS rescore
  71. 2026-07-24 14:18 UTCEPSS rescore
  72. 2026-07-24 14:18 UTCEPSS rescore
  73. 2026-07-23 13:25 UTCEG score recompute
  74. 2026-07-23 13:24 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-65903?
CVE-2026-65903 is a medium vulnerability published on July 23, 2026. DOMPurify before 3.4.0 contains a logic error in the ADDTAGS function where short-circuit evaluation allows forbidden tags to bypass FORBIDTAGS restrictions. Attackers can craft input containing tags listed in FORBIDTAGS that are also added via ADDTAGS function, causing them to be retained in…
When was CVE-2026-65903 disclosed?
CVE-2026-65903 was first published in the National Vulnerability Database on July 23, 2026, with the most recent update on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-65903 actively exploited?
CVE-2026-65903 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 74.2% of all scored CVEs.
What is the CVSS score of CVE-2026-65903?
CVE-2026-65903 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-65903?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65903, 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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