CVE-2026-90682
Received Received - Intake

Heap-based Buffer Overflow in jhead WebP EXIF Handler

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: VulDB

Description
A security vulnerability has been detected in Matthias-Wandel jhead up to 3.3. This impacts the function ProcessGpsInfo of the file gpsinfo.c of the component WebP EXIF Handler. Such manipulation of the argument TAG_GPS_LAT/TAG_GPS_LONG leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.

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Meta Information

Published
2026-09-14
Last Modified
2026-09-14
Generated
2026-09-14
AI Q&A
2026-09-14
EPSS Evaluated
N/A
NVD
CVE-2026-90682
EUVD
EUVD-2026-77198

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
matthias_wandel jhead to 3.3 (inc)
matthias-wandel jhead to 3.3 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Attack-Flow Graph

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Executive Summary

This vulnerability is a heap-based buffer overflow in the jhead image processing tool up to version 3.3. It occurs in the ProcessGpsInfo function when handling malformed WebP EXIF data containing GPS information. The flaw allows an attacker to craft a specially designed EXIF GPS sub-directory that causes an out-of-bounds memory read, potentially leading to information disclosure or denial of service.

Detection Guidance

This vulnerability is triggered by processing malformed WebP files with crafted EXIF GPS data. To detect it, inspect files processed by jhead v3.3 for WebP files containing GPS EXIF metadata. Use tools like 'file' to check file types and 'exiftool' to extract EXIF data for anomalies in GPS tags.

Impact Analysis

An attacker could exploit this to read sensitive memory data or crash the application, causing denial of service. Since the attack requires local access, the risk is higher for users processing untrusted WebP files on their systems.

Compliance Impact

This vulnerability primarily causes information disclosure or denial of service through heap-based buffer overflow in GPS data processing. It does not directly impact GDPR or HIPAA compliance unless sensitive data is exposed or systems are disrupted during processing.

Mitigation Strategies

Immediately upgrade jhead to a patched version if available. Avoid processing untrusted WebP files with jhead v3.3. Implement file validation checks before processing images. Monitor for crashes or memory corruption when handling WebP files.

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