Skip to content
Fencer Vulns
critical 9.8

CVE-2023-46853 json

In Memcached before 1.6.22, an off-by-one error exists when processing proxy requests in proxy mode, if \n is used instead of \r\n.

published 2023-10-27 3 y ago modified 2026-09-08 2 mo ago also BIT-memcached-2023-46853 , EUVD-2023-51019

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

In Memcached before 1.6.22, an off-by-one error exists when processing proxy requests in proxy mode, if \n is used instead of \r\n.

Patch / fix

  • bitnami memcached 1.6.22
  • memcached memcached 1.6.22
  • memcached Debian 12 1.6.18-1+deb12u1
  • memcached Debian 14, Debian 13 1.6.22-1

debian advisories DEBIAN-CVE-2023-46853

  • memcached Ubuntu 22.04 LTS 1.6.14-1ubuntu0.1

ubuntu advisories UBUNTU-CVE-2023-46853

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • memcached openSUSE Tumbleweed 1.6.22-1.1

opensuse advisories openSUSE-SU-2024:13427-1

  • memcached CBL-Mariner 2.0 1.6.22-1
  • memcached Azure Linux 3.0 1.6.27-1

azure linux advisories AZL-31732AZL-34977

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-46853 updated cvss 9.8

memcached: off-by-one error when processing proxy requests in proxy mode

  • Red Hat Enterprise Linux 6 memcached Red Hat Enterprise Linux 7 memcached Red Hat Enterprise Linux 8 memcached Red Hat Enterprise Linux 9 memcached, memcached-selinux
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.88% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
bitnami memcached
<1.6.22
1.6.22

Affected products

  • memcached memcached

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.