What is CVE-2020-23706?

CVE-2020-23706 is a medium-severity vulnerability in Ok-File-Formats Project, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2021-07-15.

How severe is CVE-2020-23706?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Ok-File-Formats Project

CVE-2020-23706

A heap-based buffer overflow vulnerability in the function ok_jpg_decode_block_subsequent_scan() ok_jpg.c:1102 of ok-file-formats through 2020-06-26 allows attackers to cause a Denial of Service (DOS) via a crafted jpeg file.

Vulnerability class: Buffer Overflow

Published 2021-07-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (61.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Ok-File-Formats Project

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/brackeen/ok-file-formats/issues/7 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-23706?: CVE-2020-23706 is a medium-severity vulnerability in Ok-File-Formats Project, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2021-07-15.
How severe is CVE-2020-23706?: Medium severity. CVSS v3 base score is 6.5 out of 10.