What’s Vulnerable › Vulnerabilities

CVE-2026-111158: EarthScope libmseed through 3.5.4 Heap Out-of-Bounds Read via ms3_detect

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-15 · updated 2026-10-16
• Weakness: CWE-125

Description

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.

Affected products

• EarthScope libmseed: through 3.5.4

References

• https://github.com/EarthScope/libmseed
• https://github.com/EarthScope/libmseed/blob/d6e6ad306de5b7bdde072e5a5e3d58ddcc11abd8/parseutils.c#L192-L234
• https://github.com/EarthScope/libmseed/commit/c93a36a1381e944b59b10967342ee1cb94304223
• https://hackmd.io/@haind-pwn/libmseed-ms3detect-short-header-oob-read
• https://www.vulncheck.com/advisories/earthscope-libmseed-through-3.5.4-heap-out-of-bounds-read-via-ms3-detect

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