CVE-2026-5222

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 75% 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
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Cargo between 1.68 and 1.96 incorrectly normalized the URLs of third-party registries using the sparse index protocol. If a hosting provider allowed multiple registries to be hosted with arbitrary names within the same domain, an attacker able to publish crates in a registry could obtain the credentials of others users of the same registry. The severity of the vulnerability is low, due to the extremely niche requirements needed to achieve the attack.

CVSS v3
6.5
EG Score
6.5(medium)
EPSS
24.9%
KEV
Not listed

Published

May 25, 2026

Last Modified

June 1, 2026

Advisory Details (3)

Auto-updated Jun 13, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr.
generic
https://groups.google.com/g/rustlang-security-announcements/c/SfUxOiIdY5s
github_pr

Fix CVE-2026-5222 and CVE-2026-5223

Fix merged in rust-lang/cargo PR #17031 on 2026-05-25 — awaiting tagged release

https://github.com/rust-lang/cargo/pull/17031
generic

Security Advisory for Cargo (CVE-2026-5222) | Rust Blog

https://blog.rust-lang.org/2026/05/25/cve-2026-5222/

Vendor Advisories for CVE-2026-5222(2)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 57× 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 107 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:00 UTCEPSS rescore
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-13 22:31 UTCEPSS rescore
  6. 2026-07-13 06:13 UTCEPSS rescore
  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-12 05:46 UTCEPSS rescore
  9. 2026-07-11 08:27 UTCEPSS rescore
  10. 2026-07-11 08:27 UTCEPSS rescore
  11. 2026-07-09 19:10 UTCEPSS rescore
  12. 2026-07-09 19:10 UTCEPSS rescore
  13. 2026-07-08 15:16 UTCEPSS rescore
  14. 2026-07-08 15:16 UTCEPSS rescore
  15. 2026-07-07 13:46 UTCEPSS rescore
  16. 2026-07-07 13:46 UTCEPSS rescore
  17. 2026-07-06 16:27 UTCEPSS rescore
  18. 2026-07-06 16:27 UTCEPSS rescore
  19. 2026-07-06 02:23 UTCEPSS rescore
  20. 2026-07-06 02:23 UTCEPSS rescore
  21. 2026-07-05 02:31 UTCEPSS rescore
  22. 2026-07-05 02:30 UTCEPSS rescore
  23. 2026-07-04 06:31 UTCEPSS rescore
  24. 2026-07-04 06:31 UTCEPSS rescore
  25. 2026-07-01 15:07 UTCEPSS rescore
Show 75 more
  1. 2026-06-30 23:22 UTCEPSS rescore
  2. 2026-06-29 14:06 UTCEPSS rescore
  3. 2026-06-29 02:13 UTCEG score recompute
  4. 2026-06-29 02:13 UTCVendor advisory
  5. 2026-06-28 14:07 UTCEPSS rescore
  6. 2026-06-28 04:56 UTCEPSS rescore
  7. 2026-06-27 19:57 UTCEG score recompute
  8. 2026-06-27 19:57 UTCVendor advisory
  9. 2026-06-27 03:08 UTCEPSS rescore
  10. 2026-06-26 18:57 UTCEG score recompute
  11. 2026-06-26 18:57 UTCVendor advisory
  12. 2026-06-25 13:49 UTCEPSS rescore
  13. 2026-06-25 13:38 UTCEG score recompute
  14. 2026-06-25 13:38 UTCVendor advisory
  15. 2026-06-24 14:05 UTCEPSS rescore
  16. 2026-06-23 21:33 UTCEPSS rescore
  17. 2026-06-23 21:33 UTCEPSS rescore
  18. 2026-06-22 14:25 UTCEPSS rescore
  19. 2026-06-22 14:25 UTCEPSS rescore
  20. 2026-06-21 14:56 UTCEPSS rescore
  21. 2026-06-21 14:56 UTCEPSS rescore
  22. 2026-06-21 01:59 UTCEPSS rescore
  23. 2026-06-21 01:59 UTCEPSS rescore
  24. 2026-06-19 19:26 UTCEPSS rescore
  25. 2026-06-19 19:26 UTCEPSS rescore
  26. 2026-06-18 17:52 UTCEPSS rescore
  27. 2026-06-18 17:52 UTCEPSS rescore
  28. 2026-06-17 20:12 UTCEG score recompute
  29. 2026-06-17 17:53 UTCEPSS rescore
  30. 2026-06-16 19:13 UTCEG score recompute
  31. 2026-06-16 19:13 UTCVendor advisory
  32. 2026-06-16 17:53 UTCEPSS rescore
  33. 2026-06-15 17:49 UTCEPSS rescore
  34. 2026-06-15 17:49 UTCEPSS rescore
  35. 2026-06-15 14:41 UTCEG score recompute
  36. 2026-06-15 14:41 UTCVendor advisory
  37. 2026-06-14 23:18 UTCEPSS rescore
  38. 2026-06-14 11:37 UTCEG score recompute
  39. 2026-06-14 11:37 UTCVendor advisory
  40. 2026-06-13 23:00 UTCEPSS rescore
  41. 2026-06-13 10:38 UTCEG score recompute
  42. 2026-06-13 10:38 UTCVendor advisory
  43. 2026-06-12 23:12 UTCEPSS rescore
  44. 2026-06-12 23:12 UTCEPSS rescore
  45. 2026-06-12 09:31 UTCEG score recompute
  46. 2026-06-11 14:00 UTCEPSS rescore
  47. 2026-06-11 08:31 UTCEG score recompute
  48. 2026-06-10 22:19 UTCEPSS rescore
  49. 2026-06-10 13:22 UTCEPSS rescore
  50. 2026-06-10 07:32 UTCEG score recompute
  51. 2026-06-09 06:29 UTCEG score recompute
  52. 2026-06-08 14:17 UTCEPSS rescore
  53. 2026-06-08 05:29 UTCEG score recompute
  54. 2026-06-07 15:25 UTCEPSS rescore
  55. 2026-06-07 04:30 UTCEG score recompute
  56. 2026-06-07 04:30 UTCEG score recompute
  57. 2026-06-06 13:47 UTCEPSS rescore
  58. 2026-06-06 03:30 UTCEG score recompute
  59. 2026-06-05 22:47 UTCEPSS rescore
  60. 2026-06-05 06:10 UTCEPSS rescore
  61. 2026-06-05 06:10 UTCEPSS rescore
  62. 2026-06-05 02:31 UTCEG score recompute
  63. 2026-06-04 13:12 UTCEPSS rescore
  64. 2026-06-04 13:12 UTCEPSS rescore
  65. 2026-06-04 01:31 UTCEG score recompute▲ 4.20
  66. 2026-06-02 20:13 UTCEPSS rescore
  67. 2026-06-01 13:52 UTCEPSS rescore
  68. 2026-06-01 13:52 UTCEPSS rescore
  69. 2026-06-01 02:22 UTCEG score recompute
  70. 2026-05-31 22:30 UTCEPSS rescore
  71. 2026-05-31 22:30 UTCEPSS rescore
  72. 2026-05-31 00:16 UTCEPSS rescore
  73. 2026-05-31 00:16 UTCEPSS rescore
  74. 2026-05-29 13:44 UTCEPSS rescore
  75. 2026-05-29 13:44 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-5222?
CVE-2026-5222 is a medium vulnerability published on May 25, 2026. Cargo between 1.68 and 1.96 incorrectly normalized the URLs of third-party registries using the sparse index protocol. If a hosting provider allowed multiple registries to be hosted with arbitrary names within the same domain, an attacker able to publish crates in a registry could obtain the…
When was CVE-2026-5222 disclosed?
CVE-2026-5222 was first published in the National Vulnerability Database on May 25, 2026, with the most recent update on June 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5222 actively exploited?
CVE-2026-5222 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-5222?
CVE-2026-5222 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-5222?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5222, 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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