CVE-2026-39103: Heap Overflow (CVSS 5.5)

Description

Buffer Overflow vulnerability in GPAC before commit v391dc7f4d234988ea0bc3cc294eb725eddf8f702 allows an attacker to cause a denial of service via the src/scenegraph/svg_attributes.c, svg_parse_strings(), gf_svg_parse_attribute()

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS — Exploit Prediction

0.0002

Probability of exploitation

0.05%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-122 CWE-122

References

Other References

https://github.com/gpac/gpac/commit/391dc7f4d234988ea0bc3cc294eb725eddf8f702 https://github.com/gpac/gpac/issues/3506 https://github.com/gpac/gpac/issues/3506

Frequently Asked Questions

What is CVE-2026-39103? +

Buffer Overflow vulnerability in GPAC before commit v391dc7f4d234988ea0bc3cc294eb725eddf8f702 allows an attacker to cause a denial of service via the src/scenegraph/svg_attributes.c, svg_parse_strings(), gf_svg_parse_attribute() It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-39103? +

CVE-2026-39103 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0002, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-39103? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2026-39103