CVE-2026-6429

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-05-14. NVD baseline CVSS 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.3Exploit: NoneExposed: 0

A fix is available — apply it.

When asked to both use a .netrc file for credentials and to follow HTTP redirects, libcurl could leak the password used for the first host to the followed-to host under certain circumstances.

CVSS v3
5.3
EG Score
5.3(medium)
EPSS
40.5%
KEV
Not listed

Published

May 13, 2026

Last Modified

May 14, 2026

Advisory Details (3)

Auto-updated Jun 17, 2026
No patch confirmed yet.
generic

HackerOne

https://hackerone.com/reports/3677759
generic
https://curl.se/docs/CVE-2026-6429.json
generic

curl - netrc credential leak with reused proxy connection - CVE-2026-6429

https://curl.se/docs/CVE-2026-6429.html

Vendor Advisories for CVE-2026-6429(2)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibcurl4t64 (8.5.0-2ubuntu10.9) @ noble2026-06-27ubuntu
redhatcurl-main-8.20.0-0.1.hum12026-05-02redhat

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.

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 13× in last 7d / 69× 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 135 total refreshes for this CVE.

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

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2026-6429?
CVE-2026-6429 is a medium vulnerability published on May 13, 2026. When asked to both use a .netrc file for credentials and to follow HTTP redirects, libcurl could leak the password used for the first host to the followed-to host under certain circumstances.
When was CVE-2026-6429 disclosed?
CVE-2026-6429 was first published in the National Vulnerability Database on May 13, 2026, with the most recent update on May 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6429 actively exploited?
CVE-2026-6429 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 40.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-6429?
CVE-2026-6429 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-6429?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6429, 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.

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