CVE-2026-13676

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 60% 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
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

fast-uri versions 2.3.1 through 3.1.2 and 4.0.0 fail to canonicalize Unicode (IDN) hostnames for HTTP-family URLs. The IDN conversion path calls a helper that does not exist on the global URL constructor, silently leaving the host in its original Unicode form while normalize() and equal() still return values that differ from a WHATWG-compatible URL parser. Applications that use fast-uri to enforce host-based policy (denylists, loopback filtering, redirect validation, outbound proxy routing) before passing the same URL to Node's URL or fetch can be bypassed when the two implementations resolve the same input to different hosts. Patches: upgrade to fast-uri 3.1.3 for the 3.x line or 4.0.1 for the 4.x line. Workarounds: enforce host policy using the same URL parser used for the actual request, or reject non-ASCII hosts before policy checks.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
41%
KEV
Not listed

Published

June 29, 2026

Last Modified

September 11, 2026

Advisory Details (2)

Auto-updated Jun 29, 2026
Patch available. Sources: github.
github Patch Available

fast-uri vulnerable to host confusion via failed IDN canonicalization · Advisory · fastify/fast-uri · GitHub

https://github.com/fastify/fast-uri/security/advisories/GHSA-4c8g-83qw-93j6
generic

Security Advisories | OpenJS Foundation CVE Numbering Authority

https://cna.openjsf.org/security-advisories.html

Vendor Advisories for CVE-2026-13676(20)

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

Patch Availability(29)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatfast-uri2026-09-10redhat
redhatsatellite/iop-remediations-rhel9:17882305382026-09-03redhat
redhatcluster-observability-operator/monitoring-console-plugin-rhel9:17875976212026-08-31redhat
redhatrhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9:17871213872026-08-27redhat
redhatrhacm2/console-rhel9:17873351052026-08-26redhat
redhatmulticluster-engine/console-mce-rhel9:17866688562026-08-25redhat
redhatrh-podman-desktop-0:1.1.2-1.el10_22026-08-20redhat
redhatmulticluster-engine/console-mce-rhel9:17869119772026-08-19redhat
redhatrhacm2/console-rhel9:17869083612026-08-19redhat
redhatodf4/rook-ceph-rhel9-operator:17866295482026-08-19redhat
redhatodf4/rook-ceph-rhel9-operator:17867068802026-08-18redhat
redhatodf4/rook-ceph-rhel9-operator:17867031432026-08-18redhat
redhatdiscovery/discovery-ui-rhel9:17866348252026-08-13redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17855306562026-08-12redhat
redhatsatellite/iop-host-inventory-frontend-rhel9:17859564972026-08-06redhat
redhatsatellite/iop-vulnerability-frontend-rhel9:17859373252026-08-06redhat
redhatsatellite/iop-advisor-frontend-rhel9:17857761902026-08-06redhat
redhatsatellite/iop-vulnerability-frontend-rhel9:17857620272026-08-06redhat
redhatsatellite/iop-host-inventory-frontend-rhel9:17859227642026-08-06redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17847448592026-08-06redhat
redhatansible-automation-platform-27/mcp-server-rhel9:17854139942026-08-04redhat
redhatansible-automation-platform-tech-preview/mcp-server-rhel9:17857735092026-08-04redhat
redhatrhdh/rhdh-hub-rhel9:17854116522026-08-03redhat
redhatdevspaces/dashboard-rhel9:17847371502026-07-29redhat
redhatrhdh/red-hat-developer-hub-backstage-plugin-scaffolder-backend-module-orchestrator:17853326942026-07-29redhat
redhatopenshift4/nmstate-console-plugin-rhel9:17847284812026-07-28redhat
redhatopenshift4/nmstate-console-plugin-rhel9:17847299192026-07-28redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17841448292026-07-22redhat
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

(3 across 3 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
node-ajv8.12.0~ds+~2.1.1-5 ... 8.20.0~ds+~cs7.1.5-1 (14 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
node-ajv8.12.0~ds+~2.1.1-5 ... 8.20.0~ds+~cs6.1.3-1 (8 versions)8.20.0~ds+~cs7.1.2-1—
npm(1)
PackageVulnerable rangeFixed inDependents
fast-uri—2.4.2—

Weakness Classification(2)

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

Additional Vendor Advisories

(20)

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 11× in last 7d / 99× 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 291 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-13676?
CVE-2026-13676 is a high vulnerability published on June 29, 2026. fast-uri versions 2.3.1 through 3.1.2 and 4.0.0 fail to canonicalize Unicode (IDN) hostnames for HTTP-family URLs. The IDN conversion path calls a helper that does not exist on the global URL constructor, silently leaving the host in its original Unicode form while normalize() and equal() still…
When was CVE-2026-13676 disclosed?
CVE-2026-13676 was first published in the National Vulnerability Database on June 29, 2026, with the most recent update on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13676 actively exploited?
CVE-2026-13676 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 59.4% of all scored CVEs.
What is the CVSS score of CVE-2026-13676?
CVE-2026-13676 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-13676?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13676, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-13676

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