CVE-2026-90698

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-09-14. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.3Exploit: Elevated riskExposed: 0

A fix is available — apply it.

A security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects the function try_read_command_asciiauth of the file proto_text.c of the component mcmc Tokenizer. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.44 is able to resolve this issue. The patch is identified as af05c9302bba508b736c3da1d5670f63fe8b7db4. You should upgrade the affected component.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
55(Attend)
EG Risk 55/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
57%
KEV
Not listed

Published

September 14, 2026

Last Modified

September 15, 2026

Advisory Details (3)

Auto-updated Sep 14, 2026
🔬 Proof of concept available. Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

GitHub - memcached/memcached: memcached development tree · GitHub

https://github.com/memcached/memcached/
github_commit

commit af05c9302bba (memcached/memcached)

Fix landed in memcached/memcached commit af05c9302bba — awaiting tagged release

https://github.com/memcached/memcached/commit/af05c9302bba508b736c3da1d5670f63fe8b7db4
generic🟡 PoC Available

Memdrop: memcached pre-auth remote DoS via zero-length asciiauth token | Protectiv Research

https://protectiv.ph/research/memcached-asciiauth-empty-line-dos

Vendor Advisories for CVE-2026-90698(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntumemcached (1.6.40-1ubuntu0.3) @ resolute2026-09-25ubuntu
redhatmemcached-main-1.6.45-1.hum12026-09-03redhat

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(2)

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.

Data Freshness Timeline

(refreshed 24× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-25 08:41 UTCEG score recompute
  2. 2026-09-25 08:41 UTCVendor advisory
  3. 2026-09-25 08:41 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 06:54 UTCEG score recompute
  6. 2026-09-24 06:54 UTCVendor advisory
  7. 2026-09-24 06:54 UTCGHSA enrichment
  8. 2026-09-23 17:54 UTCEPSS rescore
  9. 2026-09-23 05:08 UTCEG score recompute
  10. 2026-09-23 05:08 UTCVendor advisory
  11. 2026-09-23 05:08 UTCGHSA enrichment
  12. 2026-09-22 16:01 UTCEPSS rescore
  13. 2026-09-22 03:21 UTCEG score recompute
  14. 2026-09-22 03:21 UTCVendor advisory
  15. 2026-09-22 03:21 UTCGHSA enrichment
  16. 2026-09-21 21:09 UTCEPSS rescore
  17. 2026-09-21 01:34 UTCEG score recompute
  18. 2026-09-21 01:34 UTCGHSA enrichment
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-19 23:47 UTCEG score recompute
  21. 2026-09-19 23:47 UTCGHSA enrichment
  22. 2026-09-18 22:00 UTCEG score recompute
  23. 2026-09-18 22:00 UTCGHSA enrichment
  24. 2026-09-18 19:28 UTCEPSS rescore
  25. 2026-09-17 20:13 UTCEG score recompute
Show 19 more
  1. 2026-09-17 20:13 UTCGHSA enrichment
  2. 2026-09-17 19:32 UTCEPSS rescore
  3. 2026-09-16 18:21 UTCEG score recompute
  4. 2026-09-16 18:21 UTCGHSA enrichment
  5. 2026-09-16 14:09 UTCEPSS rescore
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-15 16:34 UTCEG score recompute
  8. 2026-09-15 16:34 UTCGHSA enrichment
  9. 2026-09-15 16:31 UTCNVD updateCVSS v4 → 5.5
  10. 2026-09-15 16:03 UTCEG score recompute
  11. 2026-09-15 16:03 UTCGHSA enrichment
  12. 2026-09-15 16:02 UTCMITRE cvelistV5CVSS v4 → 6.9
  13. 2026-09-15 03:12 UTCEPSS rescore
  14. 2026-09-14 21:05 UTCEG score recompute
  15. 2026-09-14 21:05 UTCGHSA enrichment
  16. 2026-09-14 09:21 UTCEG score recompute
  17. 2026-09-14 09:20 UTCNVD updateCVSS v4 → 5.5
  18. 2026-09-14 08:45 UTCEG score recompute
  19. 2026-09-14 08:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-90698?
CVE-2026-90698 is a medium vulnerability published on September 14, 2026. A security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects the function tryreadcommandasciiauth of the file prototext.c of the component mcmc Tokenizer. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit…
When was CVE-2026-90698 disclosed?
CVE-2026-90698 was first published in the National Vulnerability Database on September 14, 2026, with the most recent update on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90698 actively exploited?
CVE-2026-90698 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 43.3% of all scored CVEs.
What is the CVSS score of CVE-2026-90698?
CVE-2026-90698 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-90698?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-90698, 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

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