BIT-memcached-2026-47783
CVE-2026-47783 is a timing side channel vulnerability in memcached versions prior to 1.6.42 that allows username enumeration during SASL password database authentication. The vulnerability arises because a loop exits as soon as a valid username is found, leaking timing information. Red Hat has issued security advisories for affected Red Hat Enterprise Linux 9 and 10 versions, providing updated memcached packages that address this issue. The vulnerability is rated as high severity by the source, and no known exploits are reported in the wild.
AI Analysis
Technical Summary
Memcached before version 1.6.42 contains a timing side channel vulnerability in the SASL authentication mechanism. Specifically, the username data used for SASL password database authentication can be enumerated because the authentication loop exits early upon finding a valid username, allowing an attacker to infer valid usernames based on response timing differences. Red Hat has released patches for affected versions of memcached distributed with Red Hat Enterprise Linux 9 and 10 to mitigate this issue.
Potential Impact
An attacker can enumerate valid usernames via timing analysis during SASL authentication attempts, potentially aiding further targeted attacks. This does not directly allow password compromise or remote code execution but can disclose sensitive authentication information.
Mitigation Recommendations
Official patches are available from Red Hat for affected memcached versions distributed with Red Hat Enterprise Linux 9 and 10. Users should apply these updates as detailed in Red Hat advisories RHSA-2026:27842 and RHSA-2026:27862. Refer to https://access.redhat.com/articles/11258 for update instructions. No additional mitigation is required beyond applying the official fixes.
BIT-memcached-2026-47783
Description
CVE-2026-47783 is a timing side channel vulnerability in memcached versions prior to 1.6.42 that allows username enumeration during SASL password database authentication. The vulnerability arises because a loop exits as soon as a valid username is found, leaking timing information. Red Hat has issued security advisories for affected Red Hat Enterprise Linux 9 and 10 versions, providing updated memcached packages that address this issue. The vulnerability is rated as high severity by the source, and no known exploits are reported in the wild.
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Memcached before version 1.6.42 contains a timing side channel vulnerability in the SASL authentication mechanism. Specifically, the username data used for SASL password database authentication can be enumerated because the authentication loop exits early upon finding a valid username, allowing an attacker to infer valid usernames based on response timing differences. Red Hat has released patches for affected versions of memcached distributed with Red Hat Enterprise Linux 9 and 10 to mitigate this issue.
Potential Impact
An attacker can enumerate valid usernames via timing analysis during SASL authentication attempts, potentially aiding further targeted attacks. This does not directly allow password compromise or remote code execution but can disclose sensitive authentication information.
Mitigation Recommendations
Official patches are available from Red Hat for affected memcached versions distributed with Red Hat Enterprise Linux 9 and 10. Users should apply these updates as detailed in Red Hat advisories RHSA-2026:27842 and RHSA-2026:27862. Refer to https://access.redhat.com/articles/11258 for update instructions. No additional mitigation is required beyond applying the official fixes.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_base
- Csaf Version
- 2.0
- Publisher
- Bundesamt für Sicherheit in der Informationstechnik
- Advisory Id
- WID-SEC-W-2026-1615
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-47784"]
- Cvss Version
- null
Threat ID: 6a18ab9fe29bf47b50289d44
Added to database: 05/28/2026, 20:54:55 UTC
Last enriched: 07/07/2026, 00:48:20 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 57
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