CVE-2021-36692

Name: CVE-2021-36692
Creator: NVD / NIST
Published: 2021-08-30T21:15:09.413+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.22%

Last modified Jun 17, 2026

CVE-2021-36692 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. libjxl v0.3.7 is affected by a Divide By Zero in issue in lib/extras/codec_apng.cc jxl::DecodeImageAPNG(). When encoding a malicous APNG file using cjxl, an attacker can trigger a denial of service.. EPSS estimates a 1.22% chance of exploitation in the next 30 days.

Description

libjxl v0.3.7 is affected by a Divide By Zero in issue in lib/extras/codec_apng.cc jxl::DecodeImageAPNG(). When encoding a malicous APNG file using cjxl, an attacker can trigger a denial of service.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

1.22%

64.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-369

Affected Software

Vendor	Product	Versions
Libjxl Project	Libjxl	0.3.7

References

https://github.com/libjxl/libjxl/commit/7dfa400ded53919d986c5d3d23446a09e0cf481bPatch, Third Party Advisory
https://github.com/libjxl/libjxl/issues/308Exploit, Issue Tracking, Third Party Advisory
https://github.com/libjxl/libjxl/pull/313Patch, Third Party Advisory
https://github.com/libjxl/libjxl/commit/7dfa400ded53919d986c5d3d23446a09e0cf481bPatch, Third Party Advisory
https://github.com/libjxl/libjxl/issues/308Exploit, Issue Tracking, Third Party Advisory
https://github.com/libjxl/libjxl/pull/313Patch, Third Party Advisory

Timeline

Published: Aug 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-36692?

libjxl v0.3.7 is affected by a Divide By Zero in issue in lib/extras/codec_apng.cc jxl::DecodeImageAPNG(). When encoding a malicous APNG file using cjxl, an attacker can trigger a denial of service.

How severe is CVE-2021-36692?

CVE-2021-36692 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.22% probability of exploitation in the next 30 days.

How do I fix CVE-2021-36692?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-36692?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST