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)
EG Risk
—
EPSS
42.6%
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 8× in last 7d / 47× 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 161 total refreshes for this CVE.

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

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 42.6% 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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