CVE-2026-6664

highpriority · track · 10EPSS 0.007 · 54 %ileexploit · PoCDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.73% (54th) EPSS

CVSS 7.5 · high

Is it mine?

9 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-24

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

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondaryexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-190USCWE-190US

exploits (1)

Public proof-of-concept and weaponised exploit code.

nicolasjulian/bouncer-overflowWorking POC of CVE-2026-6664 written by Sonnet 4.6PoC · poc_in_github

affected products (9)

Products and version ranges known to be affected.

Microsoft Azure Linux azl3all versionscert_bundDEcpe:/o:microsoft:azure_linux:azl3
Open Source PgBouncer <1.25.2all versionscert_bundDE
Open Source PgBouncer< 1.25.2cert_bundDE
n/a PgBouncer0 → 1.25.2enisa_euvdEU
ООО «Ред Софт» РЕД ОС≤ 8.0fstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 7.3fstec_bduRU
Сообщество свободного программного обеспечения PgBouncer≤ 1.25.2fstec_bduRU
pgbouncer pgbouncer< 1.25.2nvdUScpe:2.3:a:pgbouncer:pgbouncer:*:*:*:*:*:*:*:*
Bitnami pgbouncer< 1.25.2osvUSpkg:bitnami/pgbouncer

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1445PgBouncer: Mehrere SchwachstellenDeutsch2026-05-10csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in PgBouncer ausnutzen, um einen Denial of Service Angriff durchzuführen oder nicht näher spezifizierte Angriffe durchzuführen.
BIT-pgbouncer-2026-6664PgBouncer integer overflow in PgBouncer network packet parsing2026-05-12vendor · osvUS
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.

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd osv NVD CVE.org MITRE

published 2026-05-09modified 2026-07-28

references (5)

External citations — patches, advisories, analysis.

scry

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