CVE-2026-103484 pgvector buffer overflow in IVFFlat index build
High 8.8
Published
Updated
Check this codebase for CVE-2026-103484 and fix it if it is affected.
What it is: CVE-2026-103484 is a high-severity memory corruption vulnerability in pgvector, published on 1 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-103484 in the wild and no public exploit code.
Affected product: pgvector. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-103484/ (Markdown: https://insights.sbomify.com/CVE-2026-103484/index.md)
A database user can trigger a buffer overflow during IVFFlat index build in pgvector, potentially leading to arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-103484?
CVE-2026-103484 is a high-severity memory corruption vulnerability in pgvector, published on 1 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Which versions are affected by CVE-2026-103484?
Linux distribution packages (40)
pgvector AlmaLinux:10 | All versions | 0.8.7-1.el10_2 |
postgresql18-pgvector AlmaLinux:10 | All versions | 0.8.7-1.el10_2 |
pg_repack AlmaLinux:9 | All versions | 1.5.1-1.module_el9.6.0+146+c54fdeca |
pg_repack AlmaLinux:9 | All versions | 1.5.3-1.module_el9.8.0+234+5456f35d |
pgaudit AlmaLinux:9 | All versions | 16.0-1.module_el9.4.0+66+eb9878bc |
pgaudit AlmaLinux:9 | All versions | 18.0-1.module_el9.8.0+234+5456f35d |
pgvector AlmaLinux:9 | All versions | 0.8.7-1.module_el9.8.0+324+0cb93d9d |
pgvector AlmaLinux:9 | All versions | 0.8.7-1.module_el9.8.0+325+9e644128 |
postgis AlmaLinux:9 | All versions | 3.5.3-6.module_el9.8.0+311+c39b793b |
postgis AlmaLinux:9 | All versions | 3.6.1-4.module_el9.8.0+310+22372bcc |
postgis-client AlmaLinux:9 | All versions | 3.5.3-6.module_el9.8.0+311+c39b793b |
postgis-client AlmaLinux:9 | All versions | 3.6.1-4.module_el9.8.0+310+22372bcc |
postgis-docs AlmaLinux:9 | All versions | 3.5.3-6.module_el9.8.0+311+c39b793b |
postgis-docs AlmaLinux:9 | All versions | 3.6.1-4.module_el9.8.0+310+22372bcc |
postgis-upgrade AlmaLinux:9 | All versions | 3.5.3-6.module_el9.8.0+311+c39b793b |
postgis-upgrade AlmaLinux:9 | All versions | 3.6.1-4.module_el9.8.0+310+22372bcc |
postgis-utils AlmaLinux:9 | All versions | 3.5.3-6.module_el9.8.0+311+c39b793b |
postgis-utils AlmaLinux:9 | All versions | 3.6.1-4.module_el9.8.0+310+22372bcc |
postgres-decoderbufs AlmaLinux:9 | All versions | 2.4.0-1.Final.module_el9.4.0+66+eb9878bc |
postgres-decoderbufs AlmaLinux:9 | All versions | 3.3.1-1.Final.module_el9.8.0+234+5456f35d |
postgresql AlmaLinux:9 | All versions | 16.15-1.module_el9.8.0+311+c39b793b |
postgresql AlmaLinux:9 | All versions | 18.6-1.module_el9.8.0+310+22372bcc |
postgresql-contrib AlmaLinux:9 | All versions | 16.15-1.module_el9.8.0+311+c39b793b |
postgresql-contrib AlmaLinux:9 | All versions | 18.6-1.module_el9.8.0+310+22372bcc |
postgresql-docs AlmaLinux:9 | All versions | 16.15-1.module_el9.8.0+311+c39b793b |
postgresql-docs AlmaLinux:9 | All versions | 18.6-1.module_el9.8.0+310+22372bcc |
postgresql-plperl AlmaLinux:9 | All versions | 16.15-1.module_el9.8.0+311+c39b793b |
postgresql-plperl AlmaLinux:9 | All versions | 18.6-1.module_el9.8.0+310+22372bcc |
postgresql-plpython3 AlmaLinux:9 | All versions | 16.15-1.module_el9.8.0+311+c39b793b |
postgresql-plpython3 AlmaLinux:9 | All versions | 18.6-1.module_el9.8.0+310+22372bcc |
postgresql-pltcl AlmaLinux:9 | All versions | 16.15-1.module_el9.8.0+311+c39b793b |
postgresql-pltcl AlmaLinux:9 | All versions | 18.6-1.module_el9.8.0+310+22372bcc |
postgresql-private-devel AlmaLinux:9 | All versions | 16.15-1.module_el9.8.0+311+c39b793b |
postgresql-private-devel AlmaLinux:9 | All versions | 18.6-1.module_el9.8.0+310+22372bcc |
postgresql-private-libs AlmaLinux:9 | All versions | 16.15-1.module_el9.8.0+311+c39b793b |
postgresql-private-libs AlmaLinux:9 | All versions | 18.6-1.module_el9.8.0+310+22372bcc |
postgresql-server AlmaLinux:9 | All versions | 16.15-1.module_el9.8.0+311+c39b793b |
postgresql-server AlmaLinux:9 | All versions | 18.6-1.module_el9.8.0+310+22372bcc |
postgresql-server-devel AlmaLinux:9 | All versions | 16.15-1.module_el9.8.0+311+c39b793b |
postgresql-server-devel AlmaLinux:9 | All versions | 18.6-1.module_el9.8.0+310+22372bcc |
How do I fix CVE-2026-103484?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-103484 being exploited?
There is no known exploitation of CVE-2026-103484 in the wild and no public exploit code.
Sources
Also known as ALSA-2026:85791, ALSA-2026:85814, ALSA-2026:88359, ALSA-2026:88360, DEBIAN-CVE-2026-103484, ECHO-8baa-daff-36fe and 12 more.