CVE-2026-64645

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.8%, top 44% 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, nvd
Trending — 3 sources updated this week
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.1Exploit: None knownExposed: 0

A fix is available — apply it.

Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, a rewrites() or redirects() rule that builds its external destination hostname from request-controlled input can be pointed at an arbitrary hostname, regardless of the rule's hostname suffix. For a rewrite, Next.js proxies the request to that arbitrary host and serves the response from the application's origin, leading to Server-Side Request forgery. A redirects() rule configured this way is vulnerable to an Open Redirect. This issue has been fixed in versions 15.5.21 and 16.2.11.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity61% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
56%
KEV
Not listed

Published

July 22, 2026

Last Modified

July 29, 2026

Advisory Details (5)

Auto-updated Jul 27, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

Server-Side Request Forgery in rewrites via attacker-controlled destination hostname · Advisory · vercel/next.js · GitHub

https://github.com/vercel/next.js/security/advisories/GHSA-p9j2-gv94-2wf4
github_release Patch Available

v16.2.11

Patch available: vercel/next.js v16.2.11

https://github.com/vercel/next.js/releases/tag/v16.2.11
github_release Patch Available

v15.5.21

Patch available: vercel/next.js v15.5.21

https://github.com/vercel/next.js/releases/tag/v15.5.21
github_commit Patch Available

commit d3033266c6df (vercel/next.js)

Patch available: vercel/next.js v16.2.11 (contains commit d3033266c6df)

https://github.com/vercel/next.js/commit/d3033266c6dff23f7be71e19341fe3a8c6e2c599
github_commit Patch Available

commit 35f501357e9b (vercel/next.js)

Patch available: vercel/next.js v15.5.21 (contains commit 35f501357e9b)

https://github.com/vercel/next.js/commit/35f501357e9b0fe7c950b0d6aa8fcf5343f707e9

Vendor Advisories for CVE-2026-64645(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatnext2026-08-12redhat

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

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
next—16.2.11—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 64× 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 121 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64645?
CVE-2026-64645 is a medium vulnerability published on July 22, 2026. Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, a rewrites() or redirects() rule that builds its external destination hostname from request-controlled input can be pointed at an arbitrary hostname, regardless of…
When was CVE-2026-64645 disclosed?
CVE-2026-64645 was first published in the National Vulnerability Database on July 22, 2026, with the most recent update on July 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64645 actively exploited?
CVE-2026-64645 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 43.8% of all scored CVEs.
What is the CVSS score of CVE-2026-64645?
CVE-2026-64645 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-64645?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64645, 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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