Is CVE-2026-47783 in the CISA KEV catalog?

No. CVE-2026-47783 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-47783?

CVE-2026-47783 has a CVSS v3 base score of 8.1 (Important).

What is the EPSS score for CVE-2026-47783?

CVE-2026-47783 has an EPSS score of 1.31% (68th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-47783?

Upgrade memcached on debian 11 to 1.6.9+dfsg-1+deb11u1 or later. Fixes are available for 10 affected products.

CVE & CISA-KEV Catalog

CVE-2026-47783

HIGH

8.1

CVSS v3

NVD

Description

In memcached before 1.6.42, username data for SASL password database authentication has a timing side channel because a loop exits as soon as a valid username is found by sasl_server_userdb_checkpass.

CWE-208

How to fix

Remediation Available

memcachedDebian

Fixed in:1.6.9+dfsg-1+deb11u1CVE-2026-47783

Fixed in:1.6.42-1CVE-2026-47783

memcachedRed Hat / RHEL

Fixed in:0:1.6.23-7.el10_2.1RHSA-2026:27842

Fixed in:0:1.6.9-7.el9_8.1RHSA-2026:27862

memcachedRocky

Fixed in:0:1.6.23-7.el10_2.1RHSA-2026:27842

Fixed in:0:1.6.9-7.el9_8.1RHSA-2026:27862

memcached-debuginfoRed Hat / RHEL

Fixed in:0:1.6.23-7.el10_2.1RHSA-2026:27842

Fixed in:0:1.6.9-7.el9_8.1RHSA-2026:27862

memcached-debuginfoRocky

Fixed in:0:1.6.23-7.el10_2.1RHSA-2026:27842

Fixed in:0:1.6.9-7.el9_8.1RHSA-2026:27862

memcached-debugsourceRed Hat / RHEL

Fixed in:0:1.6.23-7.el10_2.1RHSA-2026:27842

Fixed in:0:1.6.9-7.el9_8.1RHSA-2026:27862

memcached-debugsourceRocky

Fixed in:0:1.6.23-7.el10_2.1RHSA-2026:27842

Fixed in:0:1.6.9-7.el9_8.1RHSA-2026:27862

memcached-selinuxRocky

Fixed in:0:1.6.23-7.el10_2.1RHSA-2026:27842

Fixed in:0:1.6.9-7.el9_8.1RHSA-2026:27862

memcached-selinuxRed Hat / RHEL

Fixed in:0:1.6.23-7.el10_2.1RHSA-2026:27842

Fixed in:0:1.6.9-7.el9_8.1RHSA-2026:27862

memcachedUbuntu

Fixed in:1.6.14-1ubuntu0.2USN-8320-1

Fixed in:1.6.24-1ubuntu0.1USN-8320-1

Fixed in:1.6.38-1ubuntu0.1USN-8320-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.31%probability of exploitation in 30 days

68thpercentile

Moderate risk: more likely to be exploited than 68% of all known CVEs.

References

Patch1

github.com

Release Notes2

Other references5

Related Vulnerabilities

Other CWE-208 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-9494	Medium	5.9	3.7%	-	Fix
CVE-2019-16782	Medium	6.3	3.7%	-	Fix
CVE-2025-53940	Unscored	-	2.6%	-	-
CVE-2020-1926	Medium	5.9	2.5%	-	Fix
CVE-2021-43298	Critical	9.8	2.3%	-	Fix
CVE-2024-29995	High	8.1	1.5%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-15.