stb_truetype.h v1.26 was discovered to contain a heap-buffer-overflow via the function ttUSHORT() at stb_truetype.h.

published 2022-03-17 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-30177

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 64%
public exploits: 0; none known

stb_truetype.h v1.26 was discovered to contain a heap-buffer-overflow via the function ttUSHORT() at stb_truetype.h. NOTE: Third party has disputed stating that the source code has also a disclaimer that it should only be used with trusted input.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-10-30)

Exploit prediction

1.04% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/nothings/stb/issues/1286 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input
CWE-787 Out-of-bounds Write

References

github.com /nothings/stb/issues/1286
exploit, issue-tracking, third-party-advisory

Sources

CVE List CVE-2022-25514
NVD CVE-2022-25514

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary