CVE-2026-12064

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-03. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this weekElevated
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: Elevated riskExposed: 0

A fix is available — apply it.

When a user invokes curl using a schemeless URL combined with --proto-default sftp (or scp), a disconnect occurs between the tool layer and libcurl. The tool layer incorrectly infers the URL scheme, which erroneously bypasses the initialization of critical SSH security options like CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256 and CURLOPT_SSH_KNOWNHOSTS. Conversely, the libcurl runtime successfully honors CURLOPT_DEFAULT_PROTOCOL and establishes the connection via SFTP/SCP as specified. Because the tool layer skipped the security configuration, these SSH host verification options are silently omitted, causing curl to connect to an unverified SSH remote host without throwing an error.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

July 3, 2026

Last Modified

July 7, 2026

Advisory Details (3)

Auto-updated Jul 7, 2026
No patch confirmed yet.
generic

HackerOne

https://hackerone.com/reports/3797526
generic
https://curl.se/docs/CVE-2026-12064.json
generic

curl - proto-default skips SSH verification - CVE-2026-12064

https://curl.se/docs/CVE-2026-12064.html

Vendor Advisories for CVE-2026-12064(4)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibcurl4-openssl-dev (7.47.0-1ubuntu2.19+esm17) @ xenial2026-07-26ubuntu
redhatrust-main-1.96.1-1.hum12026-07-02redhat
redhatcurl-main-8.21.0-0.1.hum12026-06-24redhat

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.

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

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 18× in last 7d / 75× 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. 2026-07-27 15:51 UTCEG score recompute
  2. 2026-07-27 15:51 UTCVendor advisory
  3. 2026-07-27 15:51 UTCGHSA enrichment
  4. 2026-07-27 14:13 UTCEPSS rescore
  5. 2026-07-27 01:35 UTCEG score recompute
  6. 2026-07-27 01:35 UTCVendor advisory
  7. 2026-07-27 01:35 UTCGHSA enrichment
  8. 2026-07-26 14:54 UTCEPSS rescore
  9. 2026-07-26 14:54 UTCEPSS rescore
  10. 2026-07-26 12:58 UTCEG score recompute
  11. 2026-07-26 12:58 UTCVendor advisory
  12. 2026-07-26 12:58 UTCGHSA enrichment
  13. 2026-07-25 14:17 UTCEPSS rescore
  14. 2026-07-24 14:17 UTCEPSS rescore
  15. 2026-07-23 14:18 UTCEPSS rescore
  16. 2026-07-23 03:05 UTCEG score recompute
  17. 2026-07-22 14:08 UTCEPSS rescore
  18. 2026-07-21 15:24 UTCEPSS rescore
  19. 2026-07-20 17:08 UTCEPSS rescore
  20. 2026-07-19 14:30 UTCEPSS rescore
  21. 2026-07-19 02:28 UTCEPSS rescore
  22. 2026-07-18 10:04 UTCEPSS rescore
  23. 2026-07-17 06:11 UTCVendor advisory
  24. 2026-07-17 06:11 UTCGHSA enrichment
  25. 2026-07-16 17:34 UTCVendor advisory
Show 50 more
  1. 2026-07-16 17:34 UTCGHSA enrichment
  2. 2026-07-16 17:02 UTCEPSS rescore
  3. 2026-07-16 04:58 UTCVendor advisory
  4. 2026-07-16 04:58 UTCGHSA enrichment
  5. 2026-07-15 16:57 UTCEPSS rescore
  6. 2026-07-15 16:22 UTCVendor advisory
  7. 2026-07-15 16:22 UTCGHSA enrichment
  8. 2026-07-15 03:46 UTCVendor advisory
  9. 2026-07-15 03:46 UTCGHSA enrichment
  10. 2026-07-15 02:00 UTCEPSS rescore
  11. 2026-07-14 15:11 UTCVendor advisory
  12. 2026-07-14 15:10 UTCGHSA enrichment
  13. 2026-07-14 02:35 UTCVendor advisory
  14. 2026-07-14 02:34 UTCGHSA enrichment
  15. 2026-07-13 22:30 UTCEPSS rescore
  16. 2026-07-13 13:59 UTCVendor advisory
  17. 2026-07-13 13:59 UTCGHSA enrichment
  18. 2026-07-13 06:12 UTCEPSS rescore
  19. 2026-07-13 01:23 UTCVendor advisory
  20. 2026-07-13 01:23 UTCGHSA enrichment
  21. 2026-07-12 12:47 UTCVendor advisory
  22. 2026-07-12 12:47 UTCGHSA enrichment
  23. 2026-07-12 05:46 UTCEPSS rescore
  24. 2026-07-12 00:11 UTCVendor advisory
  25. 2026-07-12 00:11 UTCGHSA enrichment
  26. 2026-07-11 11:34 UTCVendor advisory
  27. 2026-07-11 11:34 UTCGHSA enrichment
  28. 2026-07-11 08:27 UTCEPSS rescore
  29. 2026-07-10 22:59 UTCVendor advisory
  30. 2026-07-10 22:58 UTCGHSA enrichment
  31. 2026-07-10 10:22 UTCVendor advisory
  32. 2026-07-10 10:22 UTCGHSA enrichment
  33. 2026-07-09 21:47 UTCVendor advisory
  34. 2026-07-09 21:47 UTCGHSA enrichment
  35. 2026-07-09 19:10 UTCEPSS rescore
  36. 2026-07-09 09:10 UTCVendor advisory
  37. 2026-07-09 09:10 UTCGHSA enrichment
  38. 2026-07-08 20:33 UTCEG score recompute▲ 7.50
  39. 2026-07-08 20:33 UTCGHSA enrichment
  40. 2026-07-08 15:15 UTCEPSS rescore
  41. 2026-07-08 15:15 UTCEPSS rescore
  42. 2026-07-07 13:46 UTCEPSS rescore
  43. 2026-07-06 18:21 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  44. 2026-07-06 16:27 UTCEPSS rescore
  45. 2026-07-06 02:31 UTCGHSA enrichment
  46. 2026-07-06 02:23 UTCEPSS rescore
  47. 2026-07-05 02:30 UTCEPSS rescore
  48. 2026-07-05 02:30 UTCEPSS rescore
  49. 2026-07-03 08:28 UTCEG score recompute
  50. 2026-07-03 08:26 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-12064?
CVE-2026-12064 is a high vulnerability published on July 3, 2026. When a user invokes curl using a schemeless URL combined with --proto-default sftp (or scp), a disconnect occurs between the tool layer and libcurl. The tool layer incorrectly infers the URL scheme, which erroneously bypasses the initialization of critical SSH security options like…
When was CVE-2026-12064 disclosed?
CVE-2026-12064 was first published in the National Vulnerability Database on July 3, 2026, with the most recent update on July 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12064 actively exploited?
CVE-2026-12064 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 73.6% of all scored CVEs.
What is the CVSS score of CVE-2026-12064?
CVE-2026-12064 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-12064?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12064, 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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