What is CVE-2026-71261?

CVE-2026-71261 is a high-severity vulnerability in Mackron Dr Libs, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-08-05.

How severe is CVE-2026-71261?

High severity. CVSS v3 base score is 7.8 out of 10.

Integer overflow in Mackron Dr Libs

CVE-2026-71261

dr_libs dr_wav.h (all versions through current master) contains an integer overflow in W64 CUE chunk metadata parsing. In drwav__metadata_process_chunk, a stage-1 capacity estimate truncates the 64-bit W64 chunk sizeInBytes to size_t before dividing by DRWAV_CUE_POINT_BYTES; on 32-bit builds this truncation causes the pre-allocated extra metadata capacity to be computed incorrectly.

Vulnerability class: Integer Overflow

EPSS: 0.001 (2.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Mackron Dr_libs — versions 0

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (third-party-advisory)
309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (third-party-advisory)

Frequently asked questions

What is CVE-2026-71261?: CVE-2026-71261 is a high-severity vulnerability in Mackron Dr Libs, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-08-05.
How severe is CVE-2026-71261?: High severity. CVSS v3 base score is 7.8 out of 10.