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
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

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
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

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%
Exploitation40% × 40%
Automatability100% × 15%
EPSS PROB
0.4%
EPSS %ILE
31st
KEV
Not listed

Published

July 3, 2026

Last Modified

September 15, 2026

Advisory Details (3)

Auto-updated Jul 7, 2026
Patch available.
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(6)

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

Patch Availability(5)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibcurl4-openssl-dev (7.68.0-1ubuntu2.25+esm5) @ focal2026-09-23ubuntu
redhatpatch2026-08-19redhat
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

(5 across 5 ecosystems)
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.81.0 up to 8.22.0-r0: fixed in 8.22.0-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.81.0 up to 8.21.0-r0: fixed in 8.21.0-r0
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
curl7.88.1-10 ... 8.9.1-2~bpo12+1 (184 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
curl8.14.1-2 ... 8.23.0~rc2-1+exp1 (84 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
curl8.14.1-2 ... 8.21.0~rc2-1+exp1 (61 versions)
  • every version up to 8.21.0~rc3-1: fixed in 8.21.0~rc3-1
—

Weakness Classification(2)

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 5× in last 7d / 43× 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 298 total refreshes for this CVE.

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

Related CVEs(same product + 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 on July 3, 2026, with the most recent update on September 15, 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 0.4% probability of exploitation in the next 30 days (31st percentile of EPSS-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?
A fix for CVE-2026-12064 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-12064 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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