CVE-2026-55854

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 80% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

MariaDB Connector/Node.js is used to connect applications developed on Node.js to MariaDB and MySQL databases. Prior to 3.2.4, 3.3.3, 3.4.6, and 3.5.3, MariaDB Connector/Node.js can disclose an account password when PAM dialog authentication is negotiated over an insecure transport. In lib/cmd/handshake/auth/pam-password-auth.js and lib/cmd/handshake/authentication.js, the SendPamAuthPacketFactory behavior for the server-side plugin dialog lacked the secure-transport gate applied to mysql_clear_password. With the default sslMode=DISABLE and restrictedAuth=null settings, a hostile or on-path server can send an Authentication Switch Request for dialog over plain TCP, causing the connector to return the account password in cleartext. Properly verified TLS and a local Unix socket prevent this path, while fingerprint-only server identity validation is not sufficient. This issue is fixed in versions 3.2.4, 3.3.3, 3.4.6, and 3.5.3.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
27(Track)
EG Risk 27/100SSVC: Track

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
Severity59% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

August 28, 2026

Last Modified

September 8, 2026

Advisory Details (10)

Auto-updated Aug 28, 2026
Patch available. Sources: github, github_commit, github_release.
generic

[CONJS-353] PAM (dialog) authentication must require a secure connection - Jira

https://jira.mariadb.org/browse/CONJS-353
github Patch Available

Cleartext Transmission of Sensitive Information and Insufficiently Protected Credentials in mariadb · Advisory · mariadb-corporation/mariadb-connector-nodejs · GitHub

Affected: 3.2.4, 3.3.3, 3.4.6, and 3.5.3. Upgrade to the patched release on your branch (3.

https://github.com/mariadb-corporation/mariadb-connector-nodejs/security/advisories/GHSA-42r5-vhpq-m858
github_release Patch Available

MariaDB Connector/Node.js 3.5.3

Patch available: mariadb-corporation/mariadb-connector-nodejs 3.5.3

https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.5.3
github_release Patch Available

MariaDB Connector/Node.js 3.4.6

Patch available: mariadb-corporation/mariadb-connector-nodejs 3.4.6

https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.4.6
github_release Patch Available

MariaDB Connector/Node.js 3.3.3

Patch available: mariadb-corporation/mariadb-connector-nodejs 3.3.3

https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.3.3
github_release Patch Available

MariaDB Connector/Node.js 3.2.4

Patch available: mariadb-corporation/mariadb-connector-nodejs 3.2.4

https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.2.4
github_commit Patch Available

commit fbc159c2c8bd (mariadb-corporation/mariadb-connector-nodejs)

Patch available: mariadb-corporation/mariadb-connector-nodejs 3.3.3 (contains commit fbc159c2c8bd)

https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/fbc159c2c8bd18c2db2d2e6587ab3020bbda64b6
github_commit Patch Available

commit 9781de636841 (mariadb-corporation/mariadb-connector-nodejs)

Patch available: mariadb-corporation/mariadb-connector-nodejs 3.4.6 (contains commit 9781de636841)

https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/9781de636841d34afdd08d81dd07d43edb82f85c
github_commit Patch Available

commit 53b304264df8 (mariadb-corporation/mariadb-connector-nodejs)

Patch available: mariadb-corporation/mariadb-connector-nodejs 3.5.3 (contains commit 53b304264df8)

https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/53b304264df84496d331dba2765c3634602f342e
github_commit Patch Available

commit 29733403cfe6 (mariadb-corporation/mariadb-connector-nodejs)

Patch available: mariadb-corporation/mariadb-connector-nodejs 3.2.4 (contains commit 29733403cfe6)

https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/29733403cfe6519cdfe9c36c93765a468fbe285d

Vendor Advisories for CVE-2026-55854(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
mariadb—3.5.3—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 38× 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. 2026-09-19 14:09 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 12:27 UTCEG score recompute
  4. 2026-09-17 19:31 UTCEPSS rescore
  5. 2026-09-17 10:52 UTCEG score recompute
  6. 2026-09-16 14:08 UTCEPSS rescore
  7. 2026-09-16 09:18 UTCEG score recompute
  8. 2026-09-16 05:15 UTCEPSS rescore
  9. 2026-09-15 07:43 UTCEG score recompute
  10. 2026-09-15 03:11 UTCEPSS rescore
  11. 2026-09-14 06:09 UTCEG score recompute
  12. 2026-09-13 16:47 UTCEPSS rescore
  13. 2026-09-13 04:35 UTCEG score recompute
  14. 2026-09-12 03:00 UTCEG score recompute
  15. 2026-09-11 14:53 UTCEPSS rescore
  16. 2026-09-11 01:26 UTCEG score recompute
  17. 2026-09-10 09:35 UTCEPSS rescore
  18. 2026-09-09 23:52 UTCEG score recompute
  19. 2026-09-08 22:01 UTCEPSS rescore
  20. 2026-09-08 06:34 UTCEG score recompute
  21. 2026-09-07 16:01 UTCEPSS rescore
  22. 2026-09-07 04:59 UTCEG score recompute
  23. 2026-09-06 13:47 UTCEPSS rescore
  24. 2026-09-06 03:24 UTCEG score recompute
  25. 2026-09-05 01:50 UTCEG score recompute
Show 13 more
  1. 2026-09-04 05:07 UTCEPSS rescore
  2. 2026-09-02 22:40 UTCEG score recompute
  3. 2026-09-02 14:12 UTCEPSS rescore
  4. 2026-09-01 21:06 UTCEG score recompute
  5. 2026-09-01 13:54 UTCEPSS rescore
  6. 2026-09-01 04:40 UTCEPSS rescore
  7. 2026-08-31 19:30 UTCEG score recompute
  8. 2026-08-31 18:56 UTCEG score recompute
  9. 2026-08-31 02:34 UTCEG score recompute
  10. 2026-08-30 19:17 UTCEPSS rescore
  11. 2026-08-30 01:22 UTCEPSS rescore
  12. 2026-08-28 23:25 UTCEG score recompute
  13. 2026-08-28 22:12 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-55854?
CVE-2026-55854 is a medium vulnerability published on August 28, 2026. MariaDB Connector/Node.js is used to connect applications developed on Node.js to MariaDB and MySQL databases. Prior to 3.2.4, 3.3.3, 3.4.6, and 3.5.3, MariaDB Connector/Node.js can disclose an account password when PAM dialog authentication is negotiated over an insecure transport. In…
When was CVE-2026-55854 disclosed?
CVE-2026-55854 was first published in the National Vulnerability Database on August 28, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55854 actively exploited?
CVE-2026-55854 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 79.5% of all scored CVEs.
What is the CVSS score of CVE-2026-55854?
CVE-2026-55854 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-55854?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55854, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-55854

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