CVE-2015-6817

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 8.1Exploit: None knownExposed: 0

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

PgBouncer 1.6.x before 1.6.1, when configured with auth_user, allows remote attackers to gain login access as auth_user via an unknown username.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity81% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
81%
KEV
Not listed

Published

May 23, 2017

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Sep 13, 2026
Patch available. Sources: github_commit.
generic

A failed auth_query lookup leads to connection as auth_user! · Issue #69 · pgbouncer/pgbouncer · GitHub

https://github.com/pgbouncer/pgbouncer/issues/69
github_commit Patch Available

commit 7ca3e5279d05 (pgbouncer/pgbouncer)

Patch available: pgbouncer/pgbouncer pgbouncer_1_9_0 (contains commit 7ca3e5279d05)

https://github.com/pgbouncer/pgbouncer/commit/7ca3e5279d05fceb1e8a043c6f5b6f58dea3ed38
generic

oss-security - Re: CVE Request: PgBouncer: failed auth_query lookup leads to connection as auth_user

http://www.openwall.com/lists/oss-security/2015/09/05/7
generic

PgBouncer: Multiple vulnerabilities (GLSA 201701-24) — Gentoo security

https://security.gentoo.org/glsa/201701-24
generic

PgBouncer 1.6.1

https://pgbouncer.github.io/2015/09/pgbouncer-1-6-1

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
pgbouncer—1.6.1-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
pgbouncer—1.6.1-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
pgbouncer—1.6.1-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
pgbouncer—1.6.1-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 21× 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.

Showing the most recent 100 of 145 total refreshes for this CVE.

  1. 2026-09-19 15:35 UTCEPSS rescore
  2. 2026-09-18 19:22 UTCEPSS rescore
  3. 2026-09-18 11:06 UTCOSV refresh
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  1. 2026-08-16 02:09 UTCEPSS rescore
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  3. 2026-08-14 01:32 UTCOSV refresh
  4. 2026-08-12 13:46 UTCEPSS rescore
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  17. 2026-07-28 15:31 UTCEPSS rescore
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  22. 2026-07-23 01:19 UTCEG score recompute
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  24. 2026-07-22 21:59 UTCEG score recompute
  25. 2026-07-22 14:04 UTCEPSS rescore
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  42. 2026-07-11 08:23 UTCEPSS rescore
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  74. 2026-06-18 17:50 UTCEPSS rescore
  75. 2026-06-17 17:50 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2015-6817?
CVE-2015-6817 is a high vulnerability published on May 23, 2017. PgBouncer 1.6.x before 1.6.1, when configured with authuser, allows remote attackers to gain login access as authuser via an unknown username.
When was CVE-2015-6817 disclosed?
CVE-2015-6817 was first published in the National Vulnerability Database on May 23, 2017, 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-2015-6817 actively exploited?
CVE-2015-6817 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 18.6% of all scored CVEs.
What is the CVSS score of CVE-2015-6817?
CVE-2015-6817 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2015-6817?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-6817, 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.

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