CVE-2026-82522
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk14th percentile - higher than 14% of all known CVEs
Summary
In libjxl before 0.12, an integer underflow vulnerability exists 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.
Risk Assessment
The vulnerability may allow an attacker to inject malicious metadata into processed files, potentially leading to data integrity violations or attacks on systems processing images.
Recommendation
It is recommended to upgrade to version 0.12 or later, which fixes the issue.
Other vulnerabilities in libjxl
See all- CVE-2026-52584High
Buffer overflow vulnerability in libjxl library version 0.11.2 and earlier in the DecodeImageAPNG function. A local attacker can exploit this to obtain sensitive information.
- CVE-2026-1837High
A specially crafted file can cause libjxl's decoder to write pixel data to uninitialized unallocated memory, and then data from another uninitialized region is copied to pixel data. This occurs during color transformation of grayscale images to another grayscale color space when using the LCMS2 CMS engine.
- CVE-2023-35790High
An issue was discovered in libjxl before version 0.8.2 in dec_patch_dictionary.cc. An integer underflow in patch decoding can lead to a denial of service, such as an infinite loop.
- CVE-2023-0645Medium
An out-of-bounds read vulnerability exists in libjxl. An attacker can cause an out-of-bounds read in the EXIF handler by using a specially crafted file.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS