CVE-2026-6664: Integer Overflow or Wraparound in PgBouncer
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.
AI Analysis
Technical Summary
An integer overflow or wraparound in the network packet parsing code of PgBouncer before version 1.25.2 bypasses boundary checks during SCRAM authentication packet processing. This flaw allows an unauthenticated remote attacker to cause a crash of the PgBouncer service by sending a specially crafted malformed SCRAM authentication packet, resulting in denial of service. The vulnerability does not affect confidentiality or integrity but impacts availability.
Potential Impact
The vulnerability allows an unauthenticated remote attacker to cause a denial of service by crashing PgBouncer through malformed SCRAM authentication packets. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are currently reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider restricting access to PgBouncer authentication endpoints to trusted networks to reduce exposure. Monitor for updates from the PgBouncer project regarding patches or mitigations.
CVE-2026-6664: Integer Overflow or Wraparound in PgBouncer
Description
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
An integer overflow or wraparound in the network packet parsing code of PgBouncer before version 1.25.2 bypasses boundary checks during SCRAM authentication packet processing. This flaw allows an unauthenticated remote attacker to cause a crash of the PgBouncer service by sending a specially crafted malformed SCRAM authentication packet, resulting in denial of service. The vulnerability does not affect confidentiality or integrity but impacts availability.
Potential Impact
The vulnerability allows an unauthenticated remote attacker to cause a denial of service by crashing PgBouncer through malformed SCRAM authentication packets. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are currently reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider restricting access to PgBouncer authentication endpoints to trusted networks to reduce exposure. Monitor for updates from the PgBouncer project regarding patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- PostgreSQL
- Date Reserved
- 2026-04-20T12:25:43.095Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fe8c5ccbff5d86108b6aa9
Added to database: 5/9/2026, 1:22:36 AM
Last enriched: 5/9/2026, 1:36:26 AM
Last updated: 5/9/2026, 2:47:13 AM
Views: 3
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