CVE-2026-47784

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-05-20. NVD baseline CVSS 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.1Exploit: NoneExposed: 0

A fix is available — apply it.

In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.

CVSS v3
8.1
EG Score
8.1(medium)
EPSS
42.1%
KEV
Not listed

Published

May 20, 2026

Last Modified

May 21, 2026

Advisory Details (3)

Auto-updated May 20, 2026
No patch confirmed yet.
generic

ReleaseNotes1642 · memcached/memcached Wiki · GitHub

https://github.com/memcached/memcached/wiki/ReleaseNotes1642
generic

Comparing 1.6.41...1.6.42 · memcached/memcached · GitHub

https://github.com/memcached/memcached/compare/1.6.41...1.6.42
generic

Fix timing side-channel in SASL password database authentication · memcached/memcached@d13f282 · GitHub

https://github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fed

Vendor Advisories for CVE-2026-47784(3)

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
ubuntumemcached (1.6.38-1ubuntu0.1) @ questing2026-06-29ubuntu
redhatmemcached-main-1.6.42-0.1.hum12026-06-04redhat

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 7× in last 7d / 92× 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 187 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-47784?
CVE-2026-47784 is a high vulnerability published on May 20, 2026. In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by saslserveruserdb_checkpass.
When was CVE-2026-47784 disclosed?
CVE-2026-47784 was first published in the National Vulnerability Database on May 20, 2026, with the most recent update on May 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47784 actively exploited?
CVE-2026-47784 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 42.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-47784?
CVE-2026-47784 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-47784?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47784, 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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