CVE-2026-6664

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-09. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

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

An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
51%
KEV
Not listed

Published

May 9, 2026

Last Modified

July 24, 2026

Advisory Details (1)

Auto-updated May 9, 2026
No patch confirmed yet.
generic

PgBouncer changelog

https://www.pgbouncer.org/changelog.html#pgbouncer-125x

Vendor Advisories for CVE-2026-6664(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
pgbouncer1.15.0-1 ... 1.25.2-1 (26 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
pgbouncer1.18.0-1 ... 1.25.2-1 (18 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
pgbouncer1.24.1-1, 1.24.1-1+deb13u11.24.1-1+deb13u2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
pgbouncer1.24.1-1, 1.25.0-1, 1.25.0-2, 1.25.1-11.25.2-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 71× 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 256 total refreshes for this CVE.

  1. 2026-09-04 05:07 UTCEPSS rescore
  2. 2026-09-02 14:12 UTCEPSS rescore
  3. 2026-09-01 13:54 UTCEPSS rescore
  4. 2026-09-01 04:40 UTCEPSS rescore
  5. 2026-08-30 19:17 UTCEPSS rescore
  6. 2026-08-30 01:22 UTCEPSS rescore
  7. 2026-08-28 21:42 UTCEPSS rescore
  8. 2026-08-26 14:47 UTCEPSS rescore
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-23 18:51 UTCEG score recompute
  11. 2026-08-23 18:51 UTCVendor advisory
  12. 2026-08-23 18:51 UTCGHSA enrichment
  13. 2026-08-23 00:19 UTCEPSS rescore
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-20 22:56 UTCEPSS rescore
  16. 2026-08-19 17:04 UTCEPSS rescore
  17. 2026-08-18 13:49 UTCEPSS rescore
  18. 2026-08-18 13:49 UTCEPSS rescore
  19. 2026-08-17 13:47 UTCEPSS rescore
  20. 2026-08-17 11:28 UTCEG score recompute
  21. 2026-08-17 11:28 UTCVendor advisory
  22. 2026-08-17 11:28 UTCGHSA enrichment
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-16 14:56 UTCEPSS rescore
  25. 2026-08-16 04:31 UTCEG score recompute
Show 75 more
  1. 2026-08-16 04:31 UTCVendor advisory
  2. 2026-08-16 04:31 UTCGHSA enrichment
  3. 2026-08-16 02:15 UTCEPSS rescore
  4. 2026-08-15 01:31 UTCEPSS rescore
  5. 2026-08-14 15:01 UTCVendor advisory
  6. 2026-08-14 15:01 UTCGHSA enrichment
  7. 2026-08-14 03:05 UTCEG score recompute
  8. 2026-08-14 03:05 UTCVendor advisory
  9. 2026-08-14 03:05 UTCGHSA enrichment
  10. 2026-08-13 22:00 UTCEPSS rescore
  11. 2026-08-13 04:37 UTCGHSA enrichment
  12. 2026-08-12 16:41 UTCEG score recompute
  13. 2026-08-12 16:41 UTCVendor advisory
  14. 2026-08-12 16:41 UTCGHSA enrichment
  15. 2026-08-12 13:51 UTCEPSS rescore
  16. 2026-08-11 15:50 UTCEG score recompute
  17. 2026-08-11 15:50 UTCVendor advisory
  18. 2026-08-11 15:50 UTCGHSA enrichment
  19. 2026-08-11 02:04 UTCEG score recompute
  20. 2026-08-11 02:04 UTCVendor advisory
  21. 2026-08-11 02:04 UTCGHSA enrichment
  22. 2026-08-11 00:00 UTCEPSS rescore
  23. 2026-08-10 14:08 UTCVendor advisory
  24. 2026-08-10 14:08 UTCGHSA enrichment
  25. 2026-08-10 02:12 UTCGHSA enrichment
  26. 2026-08-09 14:17 UTCEG score recompute
  27. 2026-08-09 14:17 UTCVendor advisory
  28. 2026-08-09 14:17 UTCGHSA enrichment
  29. 2026-08-09 13:47 UTCEPSS rescore
  30. 2026-08-09 02:21 UTCEG score recompute
  31. 2026-08-09 02:21 UTCVendor advisory
  32. 2026-08-09 02:21 UTCGHSA enrichment
  33. 2026-08-08 16:37 UTCEPSS rescore
  34. 2026-08-08 13:29 UTCVendor advisory
  35. 2026-08-08 13:29 UTCGHSA enrichment
  36. 2026-08-08 01:33 UTCEG score recompute
  37. 2026-08-08 01:33 UTCVendor advisory
  38. 2026-08-08 01:33 UTCGHSA enrichment
  39. 2026-08-07 13:37 UTCVendor advisory
  40. 2026-08-07 13:37 UTCGHSA enrichment
  41. 2026-08-07 01:41 UTCEG score recompute
  42. 2026-08-07 01:41 UTCVendor advisory
  43. 2026-08-07 01:41 UTCGHSA enrichment
  44. 2026-08-06 13:47 UTCEPSS rescore
  45. 2026-08-06 10:08 UTCVendor advisory
  46. 2026-08-06 10:08 UTCGHSA enrichment
  47. 2026-08-05 22:06 UTCEG score recompute
  48. 2026-08-05 22:06 UTCVendor advisory
  49. 2026-08-05 22:06 UTCGHSA enrichment
  50. 2026-08-05 19:17 UTCEPSS rescore
  51. 2026-08-05 19:17 UTCEPSS rescore
  52. 2026-08-04 15:10 UTCEPSS rescore
  53. 2026-08-04 10:39 UTCEPSS rescore
  54. 2026-08-03 19:29 UTCEG score recompute
  55. 2026-08-03 19:29 UTCVendor advisory
  56. 2026-08-03 19:29 UTCGHSA enrichment
  57. 2026-08-03 10:36 UTCEPSS rescore
  58. 2026-08-03 02:30 UTCVendor advisory
  59. 2026-08-03 02:30 UTCGHSA enrichment
  60. 2026-08-02 14:34 UTCVendor advisory
  61. 2026-08-02 14:34 UTCGHSA enrichment
  62. 2026-08-02 02:38 UTCEG score recompute
  63. 2026-08-02 02:38 UTCVendor advisory
  64. 2026-08-02 02:38 UTCGHSA enrichment
  65. 2026-08-02 02:27 UTCEPSS rescore
  66. 2026-08-01 04:16 UTCEPSS rescore
  67. 2026-07-30 16:28 UTCEPSS rescore
  68. 2026-07-30 01:30 UTCEPSS rescore
  69. 2026-07-28 15:37 UTCEPSS rescore
  70. 2026-07-27 14:14 UTCEPSS rescore
  71. 2026-07-26 14:54 UTCEPSS rescore
  72. 2026-07-26 08:27 UTCEG score recompute
  73. 2026-07-26 08:27 UTCVendor advisory
  74. 2026-07-26 08:27 UTCGHSA enrichment
  75. 2026-07-25 14:18 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-6664?
CVE-2026-6664 is a high vulnerability published on May 9, 2026. An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.
When was CVE-2026-6664 disclosed?
CVE-2026-6664 was first published in the National Vulnerability Database on May 9, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6664 actively exploited?
CVE-2026-6664 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 49.3% of all scored CVEs.
What is the CVSS score of CVE-2026-6664?
CVE-2026-6664 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-6664?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6664, 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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