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Vulnerability record · CVE-2021-36691 · published 30 August 2021

CVE-2021-36691: Libjxl project libjxl vulnerability

LLibjxl Project · Libjxl

libjxl v0.5.0 is affected by a Assertion failed issue in lib/jxl/image.cc jxl::PlaneBase::PlaneBase(). When encoding a malicous GIF file using cjxl, an attacker can trigger a denial of service.

7.5 CVSS 3.1 High EPSS 1.1% · top 36.5% CWE-617 · CWE-617
7.5CVSS 3.1 base score, v2 5.0
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

libjxl v0.5.0 is affected by a Assertion failed issue in lib/jxl/image.cc jxl::PlaneBase::PlaneBase(). When encoding a malicous GIF file using cjxl, an attacker can trigger a denial of service.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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/issues/422 ExploitIssue TrackingThird Party Advisory
https://github.com/libjxl/libjxl/issues/422 ExploitIssue TrackingThird 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-2021-36691), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.