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 59% 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.5Exploit: None knownExposed services: Not assessed

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
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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%
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

Published

June 29, 2026

Last Modified

September 11, 2026

Advisory Details (2)

Auto-updated Jun 29, 2026
Patch available. Sources: github.
githubMentions a patch (unverified)

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 / EcosystemFix (by version range) / PatchReleasedSource
redhatquay/quay-rhel8:17885938432026-09-22redhat
redhatrhem/flightctl-ui-rhel9:17894867502026-09-16redhat
redhatrhem/flightctl-ui-rhel10:17894881112026-09-16redhat
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
redhatodf4/rook-ceph-rhel9-operator:17866295482026-08-19redhat
redhatmulticluster-engine/console-mce-rhel9:17869119772026-08-19redhat
redhatrhacm2/console-rhel9:17869083612026-08-19redhat
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-host-inventory-frontend-rhel9:17859227642026-08-06redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17847448592026-08-06redhat
redhatsatellite/iop-advisor-frontend-rhel9:17857761902026-08-06redhat
redhatsatellite/iop-vulnerability-frontend-rhel9:17857620272026-08-06redhat
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

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 rangeFix by version rangeDependents
node-ajv8.12.0~ds+~2.1.1-5 ... 8.20.0~ds+~cs7.1.6-1 (15 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
node-ajv8.12.0~ds+~2.1.1-5 ... 8.20.0~ds+~cs6.1.3-1 (8 versions)
  • every version up to 8.20.0~ds+~cs7.1.2-1: fixed in 8.20.0~ds+~cs7.1.2-1
—
npm(1)
PackageVulnerable rangeFix by version rangeDependents
fast-uri—
  • 4.0.0 up to 4.0.1: fixed in 4.0.1
  • 3.0.0 up to 3.1.3: fixed in 3.1.3
  • 2.3.1 up to 2.4.2: fixed in 2.4.2
—

Weakness Classification(2)

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

Additional Vendor Advisories

(24)

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 7× in last 7d / 39× 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 308 total refreshes for this CVE.

  1. 2026-10-09 20:06 UTCEPSS rescore
  2. 2026-10-08 17:11 UTCEPSS rescore
  3. 2026-10-07 23:47 UTCEPSS rescore
  4. 2026-10-06 15:17 UTCEPSS rescore
  5. 2026-10-05 17:42 UTCEPSS rescore
  6. 2026-10-04 23:21 UTCEPSS rescore
  7. 2026-10-03 14:25 UTCEPSS rescore
  8. 2026-10-01 19:49 UTCEPSS rescore
  9. 2026-09-30 15:02 UTCEPSS rescore
  10. 2026-09-29 15:20 UTCEPSS rescore
  11. 2026-09-28 13:51 UTCEPSS rescore
  12. 2026-09-27 13:47 UTCEPSS rescore
  13. 2026-09-26 15:58 UTCEPSS rescore
  14. 2026-09-23 13:47 UTCEPSS rescore
  15. 2026-09-23 07:33 UTCEG score recompute
  16. 2026-09-23 07:33 UTCVendor advisory
  17. 2026-09-20 20:15 UTCEPSS rescore
  18. 2026-09-18 19:27 UTCEPSS rescore
  19. 2026-09-18 06:59 UTCEG score recompute
  20. 2026-09-18 06:59 UTCVendor advisory
  21. 2026-09-16 05:14 UTCEPSS rescore
  22. 2026-09-14 00:53 UTCEG score recompute
  23. 2026-09-14 00:53 UTCVendor advisory
  24. 2026-09-13 16:46 UTCEPSS rescore
  25. 2026-09-13 09:25 UTCVendor advisory
Show 75 more
  1. 2026-09-12 15:15 UTCEG score recompute
  2. 2026-09-12 15:15 UTCVendor advisory
  3. 2026-09-12 15:00 UTCEPSS rescore
  4. 2026-09-11 14:52 UTCEPSS rescore
  5. 2026-09-11 13:24 UTCEG score recompute
  6. 2026-09-11 13:24 UTCVendor advisory
  7. 2026-09-11 12:20 UTCEG score recompute
  8. 2026-09-11 12:20 UTCVendor advisory
  9. 2026-09-11 09:36 UTCEPSS rescore
  10. 2026-09-10 13:21 UTCEG score recompute
  11. 2026-09-10 13:21 UTCVendor advisory
  12. 2026-09-10 12:25 UTCEG score recompute
  13. 2026-09-10 12:25 UTCVendor advisory
  14. 2026-09-10 09:34 UTCEPSS rescore
  15. 2026-09-09 13:39 UTCEG score recompute
  16. 2026-09-09 13:39 UTCVendor advisory
  17. 2026-09-09 12:37 UTCEG score recompute
  18. 2026-09-09 12:37 UTCVendor advisory
  19. 2026-09-08 22:00 UTCEPSS rescore
  20. 2026-09-07 16:01 UTCEPSS rescore
  21. 2026-09-07 13:47 UTCEG score recompute
  22. 2026-09-07 13:47 UTCVendor advisory
  23. 2026-09-07 12:31 UTCEG score recompute
  24. 2026-09-07 12:31 UTCVendor advisory
  25. 2026-09-06 14:44 UTCEG score recompute
  26. 2026-09-06 14:44 UTCVendor advisory
  27. 2026-09-06 13:47 UTCEPSS rescore
  28. 2026-09-04 13:29 UTCEG score recompute
  29. 2026-09-04 13:29 UTCVendor advisory
  30. 2026-09-04 12:20 UTCEG score recompute
  31. 2026-09-04 12:20 UTCVendor advisory
  32. 2026-09-04 05:06 UTCEPSS rescore
  33. 2026-09-02 14:11 UTCEPSS rescore
  34. 2026-09-02 13:36 UTCEG score recompute
  35. 2026-09-02 13:36 UTCVendor advisory
  36. 2026-09-02 12:36 UTCEG score recompute
  37. 2026-09-02 12:36 UTCVendor advisory
  38. 2026-09-01 13:53 UTCEPSS rescore
  39. 2026-09-01 04:39 UTCEPSS rescore
  40. 2026-08-31 13:30 UTCEG score recompute
  41. 2026-08-31 13:30 UTCVendor advisory
  42. 2026-08-31 12:30 UTCEG score recompute
  43. 2026-08-31 12:30 UTCVendor advisory
  44. 2026-08-30 19:17 UTCEPSS rescore
  45. 2026-08-30 18:45 UTCEG score recompute
  46. 2026-08-30 18:45 UTCVendor advisory
  47. 2026-08-30 01:21 UTCEPSS rescore
  48. 2026-08-28 21:40 UTCEPSS rescore
  49. 2026-08-28 16:45 UTCEG score recompute
  50. 2026-08-28 16:45 UTCVendor advisory
  51. 2026-08-28 15:58 UTCEG score recompute
  52. 2026-08-28 15:58 UTCVendor advisory
  53. 2026-08-28 02:53 UTCEG score recompute
  54. 2026-08-28 02:53 UTCVendor advisory
  55. 2026-08-27 14:24 UTCEPSS rescore
  56. 2026-08-27 13:34 UTCEG score recompute
  57. 2026-08-27 13:34 UTCVendor advisory
  58. 2026-08-27 13:01 UTCEG score recompute
  59. 2026-08-27 13:01 UTCVendor advisory
  60. 2026-08-26 16:20 UTCEG score recompute
  61. 2026-08-26 16:20 UTCVendor advisory
  62. 2026-08-26 12:19 UTCEG score recompute
  63. 2026-08-26 12:19 UTCVendor advisory
  64. 2026-08-25 13:48 UTCEPSS rescore
  65. 2026-08-25 13:23 UTCEG score recompute
  66. 2026-08-25 13:23 UTCVendor advisory
  67. 2026-08-25 12:18 UTCEG score recompute
  68. 2026-08-25 12:18 UTCVendor advisory
  69. 2026-08-25 00:29 UTCEG score recompute
  70. 2026-08-25 00:29 UTCVendor advisory
  71. 2026-08-24 13:29 UTCEG score recompute
  72. 2026-08-24 13:29 UTCVendor advisory
  73. 2026-08-24 12:20 UTCEG score recompute
  74. 2026-08-24 12:20 UTCVendor advisory
  75. 2026-08-23 20:28 UTCVendor advisory

Related CVEs(same product + same vendor + same CWE)

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 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 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-13676?
CVE-2026-13676 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-13676?
A fix for CVE-2026-13676 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-13676 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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