Heap disclosure and crash via oversized buffer length
Published Jul 7, 2026 · Updated Jul 7, 2026
Heap buffer over-read in Django 5.2 before 5.2.16 and 6.0 before 6.0.7 allows attackers to disclose heap memory or crash a process. GDALRaster.init uses sys.getsizeof() rather than len() for a bytes-backed raster, passing the PyBytesObject wrapper size to GDAL and making vsi_buffer read about 32 bytes past the allocation. Reachability requires an application to construct GDALRaster from attacker-controlled raster bytes and access vsi_buffer; only GDAL virtual-filesystem rasters are affected.
Summary
What happened
Heap buffer over-read in Django 5.2 before 5.2.16 and 6.0 before 6.0.7 allows attackers to disclose heap memory or crash a process. GDALRaster.init uses sys.getsizeof() rather than len() for a bytes-backed raster, passing the PyBytesObject wrapper size to GDAL and making vsi_buffer read about 32 bytes past the allocation. Reachability requires an application to construct GDALRaster from attacker-controlled raster bytes and access vsi_buffer; only GDAL virtual-filesystem rasters are affected.
The record
- CVE
- CVE-2026-53877
- Published
- Jul 7, 2026
- Updated
- Jul 7, 2026
- Vendor
- Django Software Foundation
- Product
- Django
- Classifications
- CWE-805
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 7, 2026CVE publishedPublication date reported by the CVE source.
- Jul 7, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=5.2 <5.2.16
- Affected versionversion=6.0 <6.0.7
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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