CVE-2026-73490

MEDIUMPre-NVD 4.74.7—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (20th 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
4.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 4.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.2, Loofah's HTML5 sanitizer applies its local-reference restriction only to the xlink:href attribute on SVG use and feImage elements, while browsers also accept the plain href attribute. A crafted sanitized SVG can therefore reference an arbitrary same-origin external document; use may render external SVG content containing scripts or other dangerous content, and feImage may load external images for tracking. Applications that sanitize user-supplied SVG with Loofah's default allowlist are affected. This issue is fixed in version 2.25.2.

CVSS v3
4.7
EG Score
4.7MEDIUMmedium confidence
EG Risk
21
EG Risk 21/100CISA 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
Severity47% × 45%
Exploitation0% × 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
0.3%
EPSS %ILE
20th
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 12, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 12, 2026
Patch available. Sources: github_pr, github_commit, github_release.
github_release Patch Available

2.25.2

Patch available: flavorjones/loofah v2.25.2

https://github.com/flavorjones/loofah/releases/tag/v2.25.2
github_commit Patch Available

commit 20867b9be689 (flavorjones/loofah)

Patch available: flavorjones/loofah v2.25.2 (contains commit 20867b9be689)

https://github.com/flavorjones/loofah/commit/20867b9be689521887364b74822c41ef830523c9
github_pr Patch Available

Properly restrict SVG `href`; Update `allowed_uri?` to handle whitespace character references and numeric character references without semicolons

Patch available: flavorjones/loofah v2.25.2 (PR #308 merged 2026-07-15)

https://github.com/flavorjones/loofah/pull/308

Vendor Advisories for CVE-2026-73490(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-loofah2.19.1-1 ... 2.25.2-1 (11 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
ruby-loofah2.24.0-1 ... 2.25.2-1 (6 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
ruby-loofah2.24.0-1, 2.24.1-1, 2.25.0-1, 2.25.1-1, 2.25.1-2
  • every version up to 2.25.2-1: fixed in 2.25.2-1
—
RubyGems(1)
PackageVulnerable rangeFix by version rangeDependents
loofah0.2.0 ... 2.9.1 (64 versions)
  • every version up to 2.25.2: fixed in 2.25.2
—

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-73490?
CVE-2026-73490 is a medium vulnerability published on August 12, 2026. Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.2, Loofah's HTML5 sanitizer applies its local-reference restriction only to the xlink:href attribute on SVG use and feImage elements, while browsers also accept…
When was CVE-2026-73490 disclosed?
CVE-2026-73490 was first published on August 12, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73490 actively exploited?
CVE-2026-73490 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (20th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73490?
CVE-2026-73490 has a CVSS base score of 4.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73490?
A fix for CVE-2026-73490 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73490 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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