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: 0.4%, top 69% 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 — Patch released 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
31%
KEV
Not listed

Published

June 29, 2026

Last Modified

August 25, 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(30)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrh-podman-desktop-0:1.1.2-1.el10_22026-08-20redhat
redhatodf4/rook-ceph-rhel9-operator:17866295482026-08-19redhat
redhatrhacm2/console-rhel9:17869083612026-08-19redhat
redhatmulticluster-engine/console-mce-rhel9:17869119772026-08-19redhat
redhatodf4/rook-ceph-rhel9-operator:17867031432026-08-18redhat
redhatodf4/rook-ceph-rhel9-operator:17867068802026-08-18redhat
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-advisor-frontend-rhel9:17857761902026-08-06redhat
redhatsatellite/iop-vulnerability-frontend-rhel9:17857620272026-08-06redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17847448592026-08-06redhat
redhatsatellite/iop-host-inventory-frontend-rhel9:17859227642026-08-06redhat
redhatsatellite/iop-vulnerability-frontend-rhel9:17859373252026-08-06redhat
redhatansible-automation-platform-tech-preview/mcp-server-rhel9:17857735092026-08-04redhat
redhatansible-automation-platform-27/mcp-server-rhel9:17854139942026-08-04redhat
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
redhatmta/mta-solution-server-rhel9:17841098832026-07-21redhat
redhatansible-automation-platform/automation-portal:17846229512026-07-21redhat
redhatrhmtc/openshift-migration-ui-rhel8:17836905322026-07-20redhat
redhatrhdh/rhdh-hub-rhel9:17842109212026-07-20redhat
redhatrhem/flightctl-ui-rhel10:17841945742026-07-16redhat
redhatquay/quay-rhel9:17839558462026-07-16redhat
redhatquay/quay-rhel8:17841258382026-07-15redhat
redhatrhem/flightctl-ui-rhel9:17841277362026-07-15redhat

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+~cs7.1.3-1 (10 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

(13)

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 40× in last 7d / 178× 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 220 total refreshes for this CVE.

  1. 2026-08-25 13:48 UTCEPSS rescore
  2. 2026-08-25 13:23 UTCEG score recompute
  3. 2026-08-25 13:23 UTCVendor advisory
  4. 2026-08-25 12:18 UTCEG score recompute
  5. 2026-08-25 12:18 UTCVendor advisory
  6. 2026-08-25 00:29 UTCEG score recompute
  7. 2026-08-25 00:29 UTCVendor advisory
  8. 2026-08-24 13:29 UTCEG score recompute
  9. 2026-08-24 13:29 UTCVendor advisory
  10. 2026-08-24 12:20 UTCEG score recompute
  11. 2026-08-24 12:20 UTCVendor advisory
  12. 2026-08-23 20:28 UTCVendor advisory
  13. 2026-08-23 09:27 UTCEG score recompute
  14. 2026-08-23 09:27 UTCVendor advisory
  15. 2026-08-23 00:19 UTCEPSS rescore
  16. 2026-08-22 22:27 UTCVendor advisory
  17. 2026-08-22 11:26 UTCVendor advisory
  18. 2026-08-22 00:25 UTCEG score recompute
  19. 2026-08-22 00:25 UTCVendor advisory
  20. 2026-08-21 23:48 UTCEPSS rescore
  21. 2026-08-21 13:21 UTCEG score recompute
  22. 2026-08-21 13:21 UTCVendor advisory
  23. 2026-08-21 12:30 UTCEG score recompute
  24. 2026-08-21 12:30 UTCVendor advisory
  25. 2026-08-21 11:58 UTCVendor advisory
Show 75 more
  1. 2026-08-21 00:58 UTCEG score recompute
  2. 2026-08-21 00:58 UTCVendor advisory
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 13:57 UTCEG score recompute
  5. 2026-08-20 13:57 UTCVendor advisory
  6. 2026-08-20 12:42 UTCEG score recompute
  7. 2026-08-20 12:42 UTCVendor advisory
  8. 2026-08-20 05:49 UTCEG score recompute
  9. 2026-08-20 05:49 UTCVendor advisory
  10. 2026-08-19 17:03 UTCEPSS rescore
  11. 2026-08-19 12:25 UTCEG score recompute
  12. 2026-08-19 12:25 UTCVendor advisory
  13. 2026-08-19 12:09 UTCEG score recompute
  14. 2026-08-19 12:09 UTCVendor advisory
  15. 2026-08-19 10:56 UTCVendor advisory
  16. 2026-08-18 23:41 UTCEG score recompute
  17. 2026-08-18 23:41 UTCVendor advisory
  18. 2026-08-18 13:48 UTCEPSS rescore
  19. 2026-08-18 12:38 UTCEG score recompute
  20. 2026-08-18 12:38 UTCVendor advisory
  21. 2026-08-18 12:15 UTCEG score recompute
  22. 2026-08-18 12:15 UTCVendor advisory
  23. 2026-08-17 12:19 UTCEG score recompute
  24. 2026-08-17 12:19 UTCVendor advisory
  25. 2026-08-17 12:12 UTCEG score recompute
  26. 2026-08-17 12:12 UTCVendor advisory
  27. 2026-08-17 07:33 UTCVendor advisory
  28. 2026-08-16 20:33 UTCEG score recompute
  29. 2026-08-16 20:33 UTCVendor advisory
  30. 2026-08-16 14:56 UTCEPSS rescore
  31. 2026-08-16 09:32 UTCEG score recompute
  32. 2026-08-16 09:32 UTCVendor advisory
  33. 2026-08-16 02:14 UTCEPSS rescore
  34. 2026-08-15 22:32 UTCVendor advisory
  35. 2026-08-15 11:28 UTCEG score recompute
  36. 2026-08-15 11:28 UTCVendor advisory
  37. 2026-08-15 01:30 UTCEPSS rescore
  38. 2026-08-15 00:27 UTCVendor advisory
  39. 2026-08-14 13:26 UTCEG score recompute
  40. 2026-08-14 13:26 UTCVendor advisory
  41. 2026-08-14 12:29 UTCEG score recompute
  42. 2026-08-14 12:29 UTCVendor advisory
  43. 2026-08-14 11:37 UTCVendor advisory
  44. 2026-08-14 00:37 UTCEG score recompute
  45. 2026-08-14 00:37 UTCVendor advisory
  46. 2026-08-13 22:00 UTCEPSS rescore
  47. 2026-08-13 13:36 UTCEG score recompute
  48. 2026-08-13 13:36 UTCVendor advisory
  49. 2026-08-13 12:27 UTCEG score recompute
  50. 2026-08-13 12:27 UTCVendor advisory
  51. 2026-08-13 07:43 UTCVendor advisory
  52. 2026-08-12 20:23 UTCEG score recompute
  53. 2026-08-12 20:23 UTCVendor advisory
  54. 2026-08-12 13:50 UTCEPSS rescore
  55. 2026-08-12 09:23 UTCVendor advisory
  56. 2026-08-11 22:22 UTCEG score recompute
  57. 2026-08-11 22:22 UTCVendor advisory
  58. 2026-08-11 13:42 UTCEPSS rescore
  59. 2026-08-11 11:21 UTCVendor advisory
  60. 2026-08-11 00:21 UTCEG score recompute
  61. 2026-08-11 00:21 UTCVendor advisory
  62. 2026-08-10 23:59 UTCEPSS rescore
  63. 2026-08-10 13:20 UTCEG score recompute
  64. 2026-08-10 13:20 UTCVendor advisory
  65. 2026-08-10 12:25 UTCEG score recompute
  66. 2026-08-10 12:25 UTCVendor advisory
  67. 2026-08-10 06:28 UTCVendor advisory
  68. 2026-08-09 19:27 UTCEG score recompute
  69. 2026-08-09 19:27 UTCVendor advisory
  70. 2026-08-09 13:46 UTCEPSS rescore
  71. 2026-08-09 08:27 UTCVendor advisory
  72. 2026-08-08 21:27 UTCEG score recompute
  73. 2026-08-08 21:27 UTCVendor advisory
  74. 2026-08-08 16:37 UTCEPSS rescore
  75. 2026-08-08 10:26 UTCVendor advisory

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 August 25, 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 68.8% 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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