BIT-pgbouncer-2026-6665

vendorUSosv

PgBouncer buffer overflow in SCRAM

view advisory published 2026-05-12Licence: per source

The SCRAM code in PgBouncer before 1.25.2 did not check the return value of strlcat() correctly when building the contents of the SCRAM client-final-message. A malicious backend that sends a SCRAM server-final-message with a long nonce can trigger a stack overflow.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-6665US	critical9.8	0.44% (38th)	—	2026-05-09
The SCRAM code in PgBouncer before 1.25.2 did not check the return value of strlcat() correctly when building the contents of the SCRAM client-final-message. A malicious backend th…

references

External citations — patches, advisories, analysis.

https://nvd.nist.gov/vuln/detail/CVE-2026-6665WEB
https://www.pgbouncer.org/changelog.html#pgbouncer-125xARTICLE

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