Vulnerability · Published Oct 1, 2026 · Assigned by PostgreSQL
CVE-2026-103484pgvector buffer overflow in IVFFlat index build
High 8.8
In plain English
A high-severity out-of-bounds write in pgvector. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.4%top 63.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
IVFFlat index build in pgvector before 0.8.7 allows a database user to write data out-of-bounds, which can lead to arbitrary code execution.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:9 | pg_repack | 1.5.1-1.module_el9.6.0+146+c54fdeca | ALSA-2026:85791 |
| AlmaLinux:9 | pg_repack | 1.5.3-1.module_el9.8.0+234+5456f35d | ALSA-2026:85814 |
| AlmaLinux:9 | pgaudit | 16.0-1.module_el9.4.0+66+eb9878bc | ALSA-2026:85791 |
| AlmaLinux:9 | pgaudit | 18.0-1.module_el9.8.0+234+5456f35d | ALSA-2026:85814 |
| AlmaLinux:10 | pgvector | 0.8.7-1.el10_2 | ALSA-2026:88359 |
| AlmaLinux:9 | pgvector | 0.8.7-1.module_el9.8.0+325+9e644128 | ALSA-2026:85814 |
| AlmaLinux:9 | pgvector | 0.8.7-1.module_el9.8.0+324+0cb93d9d | ALSA-2026:85791 |
| AlmaLinux:9 | postgis | 3.5.3-6.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgis | 3.6.1-4.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgis-client | 3.6.1-4.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgis-client | 3.5.3-6.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgis-docs | 3.6.1-4.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgis-docs | 3.5.3-6.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgis-upgrade | 3.6.1-4.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgis-upgrade | 3.5.3-6.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgis-utils | 3.6.1-4.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgis-utils | 3.5.3-6.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgres-decoderbufs | 2.4.0-1.Final.module_el9.4.0+66+eb9878bc | ALSA-2026:85791 |
| AlmaLinux:9 | postgres-decoderbufs | 3.3.1-1.Final.module_el9.8.0+234+5456f35d | ALSA-2026:85814 |
| AlmaLinux:9 | postgresql | 18.6-1.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgresql | 16.15-1.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgresql-contrib | 18.6-1.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgresql-contrib | 16.15-1.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgresql-docs | 18.6-1.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgresql-docs | 16.15-1.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgresql-plperl | 18.6-1.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgresql-plperl | 16.15-1.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgresql-plpython3 | 16.15-1.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgresql-plpython3 | 18.6-1.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgresql-pltcl | 18.6-1.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgresql-pltcl | 16.15-1.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgresql-private-devel | 16.15-1.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgresql-private-devel | 18.6-1.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgresql-private-libs | 18.6-1.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgresql-private-libs | 16.15-1.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgresql-server | 16.15-1.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgresql-server | 18.6-1.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgresql-server-devel | 16.15-1.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgresql-server-devel | 18.6-1.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgresql-static | 16.15-1.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgresql-static | 18.6-1.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgresql-test | 18.6-1.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgresql-test | 16.15-1.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgresql-test-rpm-macros | 16.15-1.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgresql-test-rpm-macros | 18.6-1.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgresql-upgrade | 18.6-1.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:9 | postgresql-upgrade | 16.15-1.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgresql-upgrade-devel | 16.15-1.module_el9.8.0+311+c39b793b | ALSA-2026:85791 |
| AlmaLinux:9 | postgresql-upgrade-devel | 18.6-1.module_el9.8.0+310+22372bcc | ALSA-2026:85814 |
| AlmaLinux:10 | postgresql18-pgvector | 0.8.7-1.el10_2 | ALSA-2026:88360 |
| Debian:13 | pgvector | no fix listed | DEBIAN-CVE-2026-103484 |
| Debian:14 | pgvector | 0.8.7-1 | DEBIAN-CVE-2026-103484 |
| Rocky Linux:9 | pg_repack | 0:1.5.3-1.module+el9.8.0+40213+f1e225a4 | RLSA-2026:85814 |
| Rocky Linux:9 | pg_repack | 0:1.5.1-1.module+el9.8.0+40212+d6f50005 | RLSA-2026:85791 |
| Rocky Linux:9 | pg_repack | 0:1.5.1-1.module+el9.8.0+40159+adcaa225 | RLSA-2026:85791 |
| Rocky Linux:9 | pg_repack | 0:1.5.3-1.module+el9.8.0+40158+490b3c67 | RLSA-2026:85814 |
| Rocky Linux:9 | pgaudit | 0:16.0-1.module+el9.8.0+40212+d6f50005 | RLSA-2026:85791 |
| Rocky Linux:9 | pgaudit | 0:16.0-1.module+el9.8.0+40159+adcaa225 | RLSA-2026:85791 |
| Rocky Linux:9 | pgaudit | 0:18.0-1.module+el9.8.0+40158+490b3c67 | RLSA-2026:85814 |
| Rocky Linux:9 | pgaudit | 0:18.0-1.module+el9.8.0+40213+f1e225a4 | RLSA-2026:85814 |
| Rocky Linux:9 | postgis | 0:3.6.1-4.module+el9.8.0+40321+a908ab5d | RLSA-2026:85814 |
| Rocky Linux:9 | postgis | 0:3.5.3-6.module+el9.8.0+40320+f6f9ed3c | RLSA-2026:85791 |
| Rocky Linux:9 | postgres-decoderbufs | 0:3.3.1-1.Final.module+el9.8.0+40213+f1e225a4 | RLSA-2026:85814 |
| Rocky Linux:9 | postgres-decoderbufs | 0:2.4.0-1.Final.module+el9.8.0+40159+adcaa225 | RLSA-2026:85791 |
| Rocky Linux:9 | postgres-decoderbufs | 0:3.3.1-1.Final.module+el9.8.0+40158+490b3c67 | RLSA-2026:85814 |
| Rocky Linux:9 | postgres-decoderbufs | 0:2.4.0-1.Final.module+el9.8.0+40212+d6f50005 | RLSA-2026:85791 |
| Rocky Linux:9 | postgresql | 0:16.15-1.module+el9.8.0+40320+f6f9ed3c | RLSA-2026:85791 |
| Rocky Linux:9 | postgresql | 0:18.6-1.module+el9.8.0+40321+a908ab5d | RLSA-2026:85814 |
| Rocky Linux:10 | postgresql16-pgvector | 0:0.8.7-1.el10_2 | RLSA-2026:88359 |
| Rocky Linux:10 | postgresql18-pgvector | 0:0.8.7-1.el10_2 | RLSA-2026:88360 |
| Ubuntu:24.04:LTS | pgvector | no fix listed | UBUNTU-CVE-2026-103484 |
| Ubuntu:26.04:LTS | pgvector | no fix listed | UBUNTU-CVE-2026-103484 |
| Ubuntu:26.10 | pgvector | no fix listed | UBUNTU-CVE-2026-103484 |
Affected products (as reported)
Weakness: CWE-787, CWE-1284 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H