CVE-2026-103227

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreHIGH confidence

Score 6.3 from GitHub Security Advisory published 2026-09-30. A secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 6.3Exploit: Elevated riskExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

A weakness has been identified in GPAC up to 26.07.0. Affected by this issue is the function gf_dash_resolve_url of the file src/media_tools/dash_client.c of the component DASH Client. This manipulation causes buffer overflow. The attack is possible to be carried out remotely. Upgrading to version abi-16.26 can resolve this issue. Patch name: 4c8e26f278ff63eec57968f7bc696f604bb0cffd. It is recommended to upgrade the affected component.

CVSS v3
6.3
EG Score
6.3MEDIUMhigh confidence
EG Risk
44
EG Risk 44/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity63% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 30, 2026

Last Modified

October 2, 2026

Advisory Details (4)

Auto-updated Sep 30, 2026
🔬 Proof of concept available. Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
generic

GitHub - gpac/gpac: GPAC Ultramedia OSS for Video Streaming & Next-Gen Multimedia Transcoding, Packaging & Delivery · GitHub

https://github.com/gpac/gpac/
github_commit

commit 4c8e26f278ff (gpac/gpac)

Fix landed in gpac/gpac commit 4c8e26f278ff — awaiting tagged release

https://github.com/gpac/gpac/commit/4c8e26f278ff63eec57968f7bc696f604bb0cffd
github_pr

dash: resize data URL before blob rewrite

Fix merged in gpac/gpac PR #3879 on 2026-08-26 — awaiting tagged release

https://github.com/gpac/gpac/pull/3879
generic🟡 PoC Available

[security] media_tools/dash_client.c:3708 heap-buffer-overflow write in gf_dash_resolve_url via data: base64 URL rewrite · Issue #3876 · gpac/gpac · GitHub

https://github.com/gpac/gpac/issues/3876

Vendor Advisories for CVE-2026-103227(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 16× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-04 23:21 UTCEPSS rescore
  2. 2026-10-04 21:13 UTCGHSA enrichment
  3. 2026-10-03 19:20 UTCEG score recompute
  4. 2026-10-03 19:20 UTCGHSA enrichment
  5. 2026-10-03 14:25 UTCEPSS rescore
  6. 2026-10-02 17:30 UTCEG score recompute
  7. 2026-10-02 17:30 UTCGHSA enrichment
  8. 2026-10-02 16:31 UTCEG score recompute
  9. 2026-10-02 16:31 UTCGHSA enrichment
  10. 2026-10-01 19:49 UTCEPSS rescore
  11. 2026-10-01 18:16 UTCGHSA enrichment
  12. 2026-09-30 16:22 UTCGHSA enrichment
  13. 2026-09-30 15:37 UTCEG score recompute
  14. 2026-09-30 15:37 UTCGHSA enrichment
  15. 2026-09-30 14:37 UTCEG score recompute
  16. 2026-09-30 14:36 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-103227?
CVE-2026-103227 is a medium vulnerability published on September 30, 2026. A weakness has been identified in GPAC up to 26.07.0. Affected by this issue is the function gfdashresolveurl of the file src/mediatools/dash_client.c of the component DASH Client. This manipulation causes buffer overflow. The attack is possible to be carried out remotely. Upgrading to version…
When was CVE-2026-103227 disclosed?
CVE-2026-103227 was first published on September 30, 2026, with the most recent update on October 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-103227 actively exploited?
CVE-2026-103227 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-103227?
CVE-2026-103227 has a CVSS base score of 6.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-103227?
An upstream fix for CVE-2026-103227 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-103227 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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