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Vulnerability record · CVE-2021-36692 · published 30 August 2021

CVE-2021-36692: Libjxl project libjxl divide by zero vulnerability

LLibjxl Project · Libjxl

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.

6.5 CVSS 3.1 Medium EPSS 1.2% · top 32.5% CWE-369 · Divide by zero
6.5CVSS 3.1 base score, v2 4.3
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/libjxl/libjxl/commit/7dfa400ded53919d986c5d3d23446a09e0cf481b PatchThird Party Advisory
https://github.com/libjxl/libjxl/issues/308 ExploitIssue TrackingThird Party Advisory
https://github.com/libjxl/libjxl/pull/313 PatchThird Party Advisory
https://github.com/libjxl/libjxl/commit/7dfa400ded53919d986c5d3d23446a09e0cf481b PatchThird Party Advisory
https://github.com/libjxl/libjxl/issues/308 ExploitIssue TrackingThird Party Advisory
https://github.com/libjxl/libjxl/pull/313 PatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-36692), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.