How severe is CVE-2026-47783?

CVE-2026-47783 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-47783 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-47783?

CVE-2026-47783 affects Memcached. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-47783?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-47783 have an EU (EUVD) identifier?

Yes. CVE-2026-47783 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31065.

When was CVE-2026-47783 published?

CVE-2026-47783 was published on 2026-05-20 and last updated on 2026-06-30.

CVE-2026-47783

CVE-2026-47783 is a high-severity vulnerability in Memcached with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-208.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31065
Weakness: CWE-208
Affected product: Memcached
Published: 2026-05-20
Last modified: 2026-06-30

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.

Frequently asked questions

What is CVE-2026-47783?: 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.
How severe is CVE-2026-47783?: CVE-2026-47783 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-47783 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-47783?: CVE-2026-47783 affects Memcached. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-47783?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-47783 have an EU (EUVD) identifier?: Yes. CVE-2026-47783 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31065.
When was CVE-2026-47783 published?: CVE-2026-47783 was published on 2026-05-20 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:memcached:memcached:*:*:*:*:*:*:*:*

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