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: 0.4%, top 68% 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
5.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.1Exploit: None knownExposed: 0

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

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
5.1(medium)
EG Risk
23(Track)
EG Risk 23/100SSVC: 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
Severity51% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

August 13, 2026

Last Modified

August 13, 2026

Advisory Details (4)

Auto-updated Aug 13, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available

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

(1 across 1 ecosystem)
RubyGems(1)
PackageVulnerable rangeFixed inDependents
rails-html-sanitizer1.0.3 ... 1.7.0 (17 versions)1.7.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 26× 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. 2026-08-25 13:49 UTCEPSS rescore
  2. 2026-08-25 07:54 UTCEG score recompute
  3. 2026-08-23 09:59 UTCEG score recompute
  4. 2026-08-23 00:19 UTCEPSS rescore
  5. 2026-08-22 11:02 UTCEG score recompute
  6. 2026-08-21 23:49 UTCEPSS rescore
  7. 2026-08-21 12:04 UTCEG score recompute
  8. 2026-08-20 22:56 UTCEPSS rescore
  9. 2026-08-20 13:07 UTCEG score recompute
  10. 2026-08-19 17:04 UTCEPSS rescore
  11. 2026-08-18 15:02 UTCEG score recompute
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 13:49 UTCEPSS rescore
  14. 2026-08-17 15:08 UTCEG score recompute
  15. 2026-08-17 13:47 UTCEPSS rescore
  16. 2026-08-16 16:11 UTCEG score recompute
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 02:15 UTCEPSS rescore
  20. 2026-08-15 17:14 UTCEG score recompute
  21. 2026-08-15 01:31 UTCEPSS rescore
  22. 2026-08-13 19:19 UTCEG score recompute
  23. 2026-08-13 18:52 UTCEG score recompute
  24. 2026-08-13 18:18 UTCEG score recompute
  25. 2026-08-13 18:12 UTCEG score recompute
Show 1 more
  1. 2026-08-13 18:11 UTCMITRE cvelistV5first tracked

Related CVEs(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 in the National Vulnerability Database on August 13, 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% probability of exploitation in the next 30 days, which ranks it in the top 67.6% of all scored CVEs.
What is the CVSS score of CVE-2026-73648?
CVE-2026-73648 has a CVSS v3 base score of 5.1 (NVD).
How do I remediate CVE-2026-73648?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73648, 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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