---
id: CVE-2026-102639
title: >-
  MobilityDB version 1.3.0 and earlier contains an out-of-bounds read
  vulnerability in the MEOS binary and library WKB deserialization logic that
  allows unprivileged database users to crash the PostgreSQL backend process by
  supplying a cra…
summary: >-
  MobilityDB version 1.3.0 and earlier contains an out-of-bounds read
  vulnerability in the MEOS binary and library WKB deserialization logic that
  allows unprivileged database users to crash the PostgreSQL backend process by
  supplying a cra…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-195
vendor: MobilityDB
product: MobilityDB
affected:
  - MobilityDB >= 1.1.0 <= 1.1.2
  - MobilityDB >= 1.2.0 < 1.2.2
  - MobilityDB >= 1.3.0 < 1.3.1
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T18:17:09.173'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102639'
references:
  - url: 'https://github.com/MobilityDB/MobilityDB/releases/tag/v1.2.2'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/MobilityDB/MobilityDB/releases/tag/v1.3.1'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/MobilityDB/MobilityDB/security/advisories/GHSA-2c92-2w7c-pm3g
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/mobilitydb-through-out-of-bounds-read-dos-via-wkb-deserialization
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-29T18:42:35.812Z'
---

## Overview

MobilityDB version 1.3.0 and earlier contains an out-of-bounds read vulnerability in the MEOS binary and library WKB deserialization logic that allows unprivileged database users to crash the PostgreSQL backend process by supplying a crafted WKB payload with a negative length field. The negative length value wraps to a large unsigned size_t due to missing signed validation, bypasses an overflow-unsafe pointer arithmetic bounds check in wkb_parse_state_check(), and causes memcpy() in text_from_wkb_state() to operate with a corrupted unbounded length, resulting in a remote denial-of-service condition affecting all sessions on the PostgreSQL instance.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.