CVE-2026-89266CWE-787

CVE-2026-89266

High · published September 12, 2026

CVSS v3.1
8.2
EPSS
1%
Percentile
50.0
In the wild
Unconfirmed
What it is

stb_vorbis through 1.22 contains a heap buffer overflow in start_decoder() where the codebook multiplicands allocation size is truncated from size_t to int. Attackers can craft a malicious Ogg Vorbis file with large entries and dimensions values to trigger out-of-bounds writes, causing process crashes or heap corruption.

The record
Technical detail
CVSS v3.1
8.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
CVSS v4.0
8.8 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
EPSS
0.00640 · 50.0th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-09-12T04:17Z
References (7)
https://github.com/nothings/stb · [email protected]https://github.com/nothings/stb/blob/2c980bb59875b0d32144a71867fbdebb2f77cd20/stb_vorbis.c#L3878-L3880 · [email protected]https://github.com/nothings/stb/blob/2c980bb59875b0d32144a71867fbdebb2f77cd20/stb_vorbis.c#L950 · [email protected]https://github.com/nothings/stb/issues/1928 · [email protected]https://github.com/nothings/stb/issues/1933 · [email protected]https://github.com/nothings/stb/issues/1947 · [email protected]https://www.vulncheck.com/advisories/stb-vorbis-through-1.22-heap-buffer-overflow-via-codebook-multiplicands · [email protected]
EPSS history
Timeline
  • 25 SEP 03:28Z
    EPSS moved — → 1%
    epss
  • 11 SEP 23:23Z
    stb_vorbis through 1.22 heap buffer overflow via codebook multiplicands
    cvelistv5