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.
CVE-2023-46853
CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence
Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2023-10-27. NVD baseline CVSS 9.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0
A fix is available — apply it.
- CVSS v3
- 9.8
- EG Score
- 9.8(medium)
- EPSS
- 50.8%
- KEV
- Not listed
Published
October 27, 2023
Last Modified
June 17, 2026
Advisory Details (2)
Auto-updated Jul 9, 2026Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic
Comparing 1.6.21...1.6.22 · memcached/memcached · GitHub
https://github.com/memcached/memcached/compare/1.6.21...1.6.22github_commit
commit 6987918e9a30 (memcached/memcached)
Fix landed in memcached/memcached commit 6987918e9a30 — awaiting tagged release
https://github.com/memcached/memcached/commit/6987918e9a3094ec4fc8976f01f769f624d790faPatch Availability(1)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | memcached (1.6.18-1ubuntu0.1) @ lunar | 2026-05-24 | ubuntu |
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.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(2)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Frequently asked(5)
What is CVE-2023-46853?
CVE-2023-46853 is a critical vulnerability published on October 27, 2023. 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.
When was CVE-2023-46853 disclosed?
CVE-2023-46853 was first published in the National Vulnerability Database on October 27, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-46853 actively exploited?
CVE-2023-46853 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 50.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-46853?
CVE-2023-46853 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-46853?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-46853, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2023-46853
Is Your Infrastructure Affected by CVE-2023-46853?
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