CVE-2026-12064

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM 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 — Patch released 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(medium)
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
27%
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(5)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibcurl4-openssl-dev (7.47.0-1ubuntu2.19+esm17) @ xenial2026-08-20ubuntu
redhatcurl-0:8.12.1-4.el10_2.32026-08-17redhat
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.

Affected Packages

(4 across 4 ecosystems)
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
curl—8.21.0-r0—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
curl7.88.1-10 ... 8.9.1-2~bpo12+1 (174 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
curl8.14.1-2 ... 8.21.0~rc3-1+exp1 (74 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
curl8.14.1-2 ... 8.21.0~rc2-1+exp1 (61 versions)8.21.0~rc3-1—

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 39× in last 7d / 149× 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 206 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 73.1% 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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