CVE-2026-13523Public exploit

Service interruption via unbounded ISOBMFF decompression

Published Jun 29, 2026 · Updated Jun 29, 2026

Uncontrolled decompression in GPAC 26.02.0 allows local users to interrupt media processing with a crafted compressed ISOBMFF box. gf_gz_decompress_payload_ex repeatedly doubles its heap output buffer while inflating attacker-controlled data without an output-size or compression-ratio limit. The vulnerable parser must process the crafted media; resulting memory exhaustion interrupts the GPAC process without reported data disclosure or modification.

CVSS severity3.3
Low
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled decompression in GPAC 26.02.0 allows local users to interrupt media processing with a crafted compressed ISOBMFF box. gf_gz_decompress_payload_ex repeatedly doubles its heap output buffer while inflating attacker-controlled data without an output-size or compression-ratio limit. The vulnerable parser must process the crafted media; resulting memory exhaustion interrupts the GPAC process without reported data disclosure or modification.

The record

CVE
CVE-2026-13523
Published
Jun 29, 2026
Updated
Jun 29, 2026
Vendor
GPAC Project
Product
GPAC
Classifications
CWE-404, CWE-409, T1499.003
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 29, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=26.02

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

GPAC Project · GPACversion=26.02

Published CVSS scores

3.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
1.9VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
1.7VulDBAV:L/AC:L/Au:S/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
CWE-409Improper Handling of Highly Compressed Data (Data Amplification)
T1499.003Application Exhaustion Flood

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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