How severe is CVE-2026-33144?

CVE-2026-33144 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability high.

Is CVE-2026-33144 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33144?

CVE-2026-33144 affects Gpac. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33144?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-33144 have an EU (EUVD) identifier?

Yes. CVE-2026-33144 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13782.

When was CVE-2026-33144 published?

CVE-2026-33144 was published on 2026-03-20 and last updated on 2026-06-17.

CVE-2026-33144

CVE-2026-33144 is a medium-severity vulnerability in Gpac with a CVSS 3.x base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Medium (CVSS 3.x base score 5.8)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-13782
Weakness: CWE-787
Affected product: Gpac
Published: 2026-03-20
Last modified: 2026-06-17

Description

GPAC is an open-source multimedia framework. Prior to commit 86b0e36, a heap-based buffer overflow (write) vulnerability was discovered in GPAC MP4Box. The vulnerability exists in the gf_xml_parse_bit_sequence_bs function in utils/xml_bin_custom.c when processing a crafted NHML file containing malicious <BS> (BitSequence) elements. An attacker can exploit this by providing a specially crafted NHML file, causing an out-of-bounds write on the heap. This issue has been via commit 86b0e36.

Frequently asked questions

What is CVE-2026-33144?: GPAC is an open-source multimedia framework. Prior to commit 86b0e36, a heap-based buffer overflow (write) vulnerability was discovered in GPAC MP4Box. The vulnerability exists in the gf_xml_parse_bit_sequence_bs function in utils/xml_bin_custom.c when processing a crafted NHML file containing malicious <BS> (BitSequence) elements. An attacker can exploit this by providing a specially crafted NHML file, causing an out-of-bounds write on the heap. This issue has been via commit 86b0e36.
How severe is CVE-2026-33144?: CVE-2026-33144 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability high.
Is CVE-2026-33144 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33144?: CVE-2026-33144 affects Gpac. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33144?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33144 have an EU (EUVD) identifier?: Yes. CVE-2026-33144 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13782.
When was CVE-2026-33144 published?: CVE-2026-33144 was published on 2026-03-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gpac:gpac:*:*:*:*:*:*:*:*

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