Heap-based buffer overflow via unchecked empty URL
Published Sep 15, 2026 · Updated Sep 15, 2026
Heap-based buffer overflow in GPAC through f1219cde allows local users to trigger an out-of-bounds access via crafted URL input. gf_url_concatenate_ex trims trailing whitespace from a heap string but indexes strlen(tmp)-1 without first checking whether the string has become empty. Local control of input reaching URL concatenation is required; the published record does not specify consequences beyond memory corruption.
Summary
What happened
Heap-based buffer overflow in GPAC through f1219cde allows local users to trigger an out-of-bounds access via crafted URL input. gf_url_concatenate_ex trims trailing whitespace from a heap string but indexes strlen(tmp)-1 without first checking whether the string has become empty. Local control of input reaching URL concatenation is required; the published record does not specify consequences beyond memory corruption.
The record
- CVE
- CVE-2026-91088
- Published
- Sep 15, 2026
- Updated
- Sep 15, 2026
- Vendor
- GPAC Project
- Product
- GPAC
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 15, 2026CVE publishedPublication date reported by the CVE source.
- Sep 15, 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=f1219cde
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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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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