libjxl up to 0.11.x Container Box Parser integer underflow

Summaryinfo

A vulnerability, which was classified as critical, has been found in libjxl up to 0.11.x. The impacted element is an unknown function of the component Container Box Parser. The manipulation leads to integer underflow. This vulnerability is listed as CVE-2026-82522. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in libjxl up to 0.11.x and classified as critical. This issue affects an unknown functionality of the component Container Box Parser. The manipulation with an unknown input leads to a integer underflow vulnerability. Using CWE to declare the problem leads to CWE-191. The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

libjxl before 0.12 contains an integer underflow vulnerability in the container box parser that allows remote attackers to inject arbitrary metadata by exploiting 64-bit box size truncation to size_t on 32-bit platforms. Attackers can supply a crafted JPEG XL file causing the decoder to parse attacker-controlled codestream bytes as phantom box headers, enabling injection of arbitrary metadata (Exif, XMP, IPTC, JUMBF) and potential out-of-bounds reads.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-82522 since 08/29/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

Upgrading to version 0.12.0 eliminates this vulnerability.

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Productinfo

Name

• libjxl

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11

Website

• Product: https://github.com/libjxl/libjxl/

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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