CVE-2026-14677: PostgreSQL 32-bit pltcl and plperl undersize allocations, via integer wraparound

highCVSS 8.8CVE-2026-14677

CSIRTS triage

vendor: PostgreSQL product: PostgreSQL Memory corruption Remote code execution

What: Integer wraparound in 32-bit pltcl and plperl procedural language handlers causes undersized allocations leading to memory corruption.
Who is affected: PostgreSQL deployments with pltcl or plperl extensions on 32-bit systems.
Urgency: High severity (CVSS 8.8); affects procedural language functionality on legacy 32-bit platforms.
Action: Update PostgreSQL to a patched version or disable pltcl/plperl if not required.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 8.8
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-14677

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-146770.60% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 46% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-14677	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

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