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
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.1Exploit: None knownExposed services: Not assessed

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
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100

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
Severity81% × 45%
Exploitation1% × 40%
Automatability0% × 15%
EPSS PROB
0.5%
EPSS %ILE
44th
KEV
Not listed

Published

May 20, 2026

Last Modified

July 24, 2026

Advisory Details (3)

Auto-updated May 20, 2026
Patch available.
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 / EcosystemFix (by version range) / PatchReleasedSource
ubuntumemcached (1.6.14-1ubuntu0.2) @ jammy2026-08-23ubuntu
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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
memcached1.6.9+dfsg-1
  • every version up to 1.6.9+dfsg-1+deb11u1: fixed in 1.6.9+dfsg-1+deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
memcached1.6.18-1
  • every version up to 1.6.18-1+deb12u1: fixed in 1.6.18-1+deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
memcached1.6.38-1 ... 1.6.45-1 (8 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
memcached1.6.38-1 ... 1.6.41-2 (6 versions)
  • every version up to 1.6.42-1: fixed in 1.6.42-1
—

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

Related CVEs(same product + same vendor + same CWE)

Same vendor

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ubuntu:USN-8320-1

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 on May 20, 2026, with the most recent update on July 24, 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 0.5% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
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?
A fix for CVE-2026-47784 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-47784 are linked in the Vendor Advisories panel on this page.

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