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CVE-2015-6817

21
FAUCET Score

CVE-2015-6817 describes a high-severity authentication bypass vulnerability in PgBouncer versions 1.6.x before 1.6.1. When PgBouncer is configured with an auth_user, remote attackers can gain unauthorized login access as that auth_user by providing an unknown username. The CVSSv3 score of 8.1 highlights the high impact on confidentiality, integrity, and availability, with a network attack vector and high attack complexity. Despite its severity, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.6CPE matchmatch criteria
cpe:2.3:a:pgbouncer:pgbouncer:1.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.16%
Probability of exploitation in next 30 days
EPSS Percentile
80.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0216 is in the 37th percentile among its peer group of 8,914 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

comments.gmane.org / gmane.comp.db.postgresql.pgbouncer.general/1251
Mailing List
github.com / pgbouncer/pgbouncer/commit/7ca3e5279d05fceb1e8a043c6f5b6f58dea3ed38
Patch
github.com / pgbouncer/pgbouncer/issues/69
Issue TrackingPatch
pgbouncer.github.io / 2015/09/pgbouncer-1-6-1
PatchVendor Advisory
security.gentoo.org / glsa/201701-24
Third Party Advisory
openwall.com / lists/oss-security/2015/09/05/7
Mailing ListPatch