---
id: CVE-2026-111158
title: >-
  EarthScope libmseed through 3.5.4 contains a heap out-of-bounds read
  vulnerability in ms3_detect() in parseutils.c that reads past truncated
  miniSEED 2 record buffers
summary: >-
  EarthScope libmseed through 3.5.4 contains a heap out-of-bounds read
  vulnerability in ms3_detect() in parseutils.c that reads past truncated
  miniSEED 2 record buffers. Attackers can supply a 40 to 47 byte buffer passing
  MS2_ISVALIDHEADER…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-125
vendor: EarthScope
product: libmseed
affected:
  - libmseed <= 3.5.4
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T19:17:30.810'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111158'
references:
  - url: 'https://github.com/EarthScope/libmseed'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/EarthScope/libmseed/blob/d6e6ad306de5b7bdde072e5a5e3d58ddcc11abd8/parseutils.c#L192-L234
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/EarthScope/libmseed/commit/c93a36a1381e944b59b10967342ee1cb94304223
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@haind-pwn/libmseed-ms3detect-short-header-oob-read'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/earthscope-libmseed-through-3.5.4-heap-out-of-bounds-read-via-ms3-detect
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
  - exploit-available
ingestedAt: '2026-10-15T19:25:46.417Z'
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-15T19:41:54.865834Z'
---

## Overview

EarthScope libmseed through 3.5.4 contains a heap out-of-bounds read vulnerability in ms3_detect() in parseutils.c that reads past truncated miniSEED 2 record buffers. Attackers can supply a 40 to 47 byte buffer passing MS2_ISVALIDHEADER to msr3_parse() or ms3_detect(), over-reading up to 8 bytes and potentially crashing the process.

## Remediation

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