CVE-2015-6817

HIGHNVD 8.18.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

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, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2.2%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100

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 (value × EchelonGraph’s weight)
Severity81% × 45%
The EG Score, 8.1 of 10.
Exploitation2.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
2.2%
EPSS %ILE
81st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 23, 2017

Last Modified

June 17, 2026

Advisory Details (5)

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

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
Web page

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
Web page

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

https://security.gentoo.org/glsa/201701-24
Web page

PgBouncer 1.6.1

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
pgbouncer—
  • every version up to 1.6.1-1: fixed in 1.6.1-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
pgbouncer—
  • every version up to 1.6.1-1: fixed in 1.6.1-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
pgbouncer—
  • every version up to 1.6.1-1: fixed in 1.6.1-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
pgbouncer—
  • every version up to 1.6.1-1: fixed in 1.6.1-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 25× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 89 of 154 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 11 repeat rows among the latest 100 are merged into the row they repeat. The 65 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-12 01:13 UTCEG score recompute
  2. 2026-10-11 13:40 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  3. 2026-10-10 19:54 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  4. 2026-10-09 20:01 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  5. 2026-10-08 16:35 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  6. 2026-10-08 05:05 UTCOSV refresh
  7. 2026-10-07 23:40 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  8. 2026-10-06 15:11 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  9. 2026-10-05 17:38 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  10. 2026-10-04 23:17 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  11. 2026-10-03 14:21 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  12. 2026-09-30 14:58 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  13. 2026-09-30 09:06 UTCEG score recompute
  14. 2026-09-28 13:45 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  15. 2026-09-27 13:40 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  16. 2026-09-26 15:53 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  17. 2026-09-23 13:41 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  18. 2026-09-20 20:09 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  19. 2026-09-19 15:35 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  20. 2026-09-18 19:22 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  21. 2026-09-18 11:06 UTCOSV refresh
  22. 2026-09-17 19:21 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  23. 2026-09-15 03:05 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  24. 2026-09-13 16:41 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  25. 2026-09-12 14:55 UTCEPSS rescoreEPSS 2.2% · 81st percentile
Show 64 more
  1. 2026-09-11 09:31 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  2. 2026-09-10 09:26 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  3. 2026-09-07 15:56 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  4. 2026-09-06 13:42 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  5. 2026-09-04 13:55 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  6. 2026-09-02 14:07 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  7. 2026-09-01 13:48 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  8. 2026-09-01 03:31 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  9. 2026-08-30 12:00 UTCOSV refresh
  10. 2026-08-27 14:20 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  11. 2026-08-26 14:41 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  12. 2026-08-25 13:44 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  13. 2026-08-23 00:13 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  14. 2026-08-21 23:44 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  15. 2026-08-20 22:50 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  16. 2026-08-19 16:59 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  17. 2026-08-18 13:43 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  18. 2026-08-16 14:51 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  19. 2026-08-16 02:09 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  20. 2026-08-15 01:25 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  21. 2026-08-14 01:32 UTCOSV refresh
  22. 2026-08-12 13:46 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  23. 2026-08-11 13:36 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  24. 2026-08-09 13:42 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  25. 2026-08-08 16:32 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  26. 2026-08-07 16:22 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  27. 2026-08-06 13:42 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  28. 2026-08-05 19:12 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  29. 2026-08-04 15:04 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  30. 2026-08-04 10:31 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  31. 2026-08-01 04:11 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  32. 2026-07-30 01:26 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  33. 2026-07-29 06:04 UTCOSV refresh
  34. 2026-07-28 15:31 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  35. 2026-07-26 14:50 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  36. 2026-07-25 14:13 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  37. 2026-07-24 14:13 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  38. 2026-07-23 14:14 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  39. 2026-07-23 01:19 UTCEG score recompute
  40. 2026-07-23 00:21 UTCEG score recompute
  41. 2026-07-22 21:59 UTCEG score recompute
  42. 2026-07-22 14:04 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  43. 2026-07-21 15:21 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  44. 2026-07-20 17:03 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  45. 2026-07-19 14:27 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  46. 2026-07-19 02:26 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  47. 2026-07-18 10:00 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  48. 2026-07-16 16:59 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  49. 2026-07-15 16:54 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  50. 2026-07-15 01:56 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  51. 2026-07-13 22:26 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  52. 2026-07-12 05:42 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  53. 2026-07-11 22:41 UTCOSV refresh
  54. 2026-07-11 08:23 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  55. 2026-07-09 19:05 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  56. 2026-07-08 15:10 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  57. 2026-07-07 13:42 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  58. 2026-07-06 16:24 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  59. 2026-07-06 02:20 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  60. 2026-07-05 02:26 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  61. 2026-07-04 06:28 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  62. 2026-07-01 15:02 UTCEPSS rescoreEPSS 2.2% · 79th percentile
  63. 2026-06-30 23:19 UTCEPSS rescoreEPSS 2.2% · 79th percentile
  64. 2026-06-29 14:03 UTCEPSS rescoreEPSS 2.2% · 79th percentile

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2015-6817?
CVE-2015-6817 is a high-severity vulnerability; its CVE record was 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 made public?
CVE-2015-6817 was made public on August 27, 2015: that is the date its CVE record's CNA, Debian GNU/Linux, gives for when the vulnerability was made public. The CVE record itself was published on May 23, 2017. EchelonGraph's copy of the record carries a last-modified date of June 17, 2026; the record at its source may have been updated since.
Is CVE-2015-6817 actively exploited?
CVE-2015-6817 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.2% probability of exploitation in the next 30 days (81st percentile of EPSS-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?
A fix for CVE-2015-6817 is available: update to the fixed version the vendor names in its advisory.

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