CVE-2026-73648

MEDIUMPre-NVD 5.15.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (43rd percentile of EPSS-scored CVEs). 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
5.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. From 1.0.3 until 1.7.1, Rails::HTML::PermitScrubber restricted SVG reference elements in SVG_ALLOW_LOCAL_HREF only when they used xlink:href, even though browsers also accept the plain href attribute. Applications with non-default allowed tags that included SVG use or feImage elements could therefore permit external references; a same-origin external SVG referenced by use could execute scripts in the sanitized document's context, while feImage could load external images for tracking. Applications using the default allowed tags are not affected. This issue is fixed in version 1.7.1.

CVSS v3
5.1
EG Score
5.1MEDIUMmedium confidence
EG Risk
23
EG Risk 23/100CISA SSVC

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
Severity51% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
44th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 13, 2026

Last Modified

September 18, 2026

Advisory Details (4)

Auto-updated Aug 13, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
githubMentions a patch (unverified)

Possible XSS vulnerability with certain configurations of rails-html-sanitizer · Advisory · rails/rails-html-sanitizer · GitHub

https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-cj75-f6xr-r4g7
github_release Patch Available

v1.7.1

Patch available: rails/rails-html-sanitizer v1.7.1

https://github.com/rails/rails-html-sanitizer/releases/tag/v1.7.1
github_pr Patch Available

Properly restrict SVG href attributes

Patch available: rails/rails-html-sanitizer v1.7.1 (PR #223 merged 2026-07-16)

https://github.com/rails/rails-html-sanitizer/pull/223
github_commit Patch Available

commit 74dcb8053e6d (rails/rails-html-sanitizer)

Patch available: rails/rails-html-sanitizer v1.7.1 (contains commit 74dcb8053e6d)

https://github.com/rails/rails-html-sanitizer/commit/74dcb8053e6da9921246ce71b06ad9fd65b19586

Vendor Advisories for CVE-2026-73648(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 rangeFix by version rangeDependents
ruby-rails-html-sanitizer1.4.4-1 ... 1.7.1-1 (6 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
ruby-rails-html-sanitizer1.6.2-1, 1.7.0-1, 1.7.0-2, 1.7.1-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
ruby-rails-html-sanitizer1.6.2-1, 1.7.0-1, 1.7.0-2
  • every version up to 1.7.1-1: fixed in 1.7.1-1
—
RubyGems(1)
PackageVulnerable rangeFix by version rangeDependents
rails-html-sanitizer1.0.3 ... 1.7.0 (17 versions)
  • 1.0.3 up to 1.7.1: fixed in 1.7.1
—

Weakness Classification(1)

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

Data Freshness Timeline

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-73648?
CVE-2026-73648 is a medium vulnerability published on August 13, 2026. rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. From 1.0.3 until 1.7.1, Rails::HTML::PermitScrubber restricted SVG reference elements in SVGALLOWLOCAL_HREF only when they used xlink:href, even though browsers also accept the plain href attribute.…
When was CVE-2026-73648 disclosed?
CVE-2026-73648 was first published on August 13, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73648 actively exploited?
CVE-2026-73648 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73648?
CVE-2026-73648 has a CVSS base score of 5.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73648?
A fix for CVE-2026-73648 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73648 are linked in the Vendor Advisories panel on this page.

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