CVE-2026-88339

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-09-22. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.5Exploit: 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 NULL pointer dereference vulnerability exists in the gf_sg_vrml_field_clone() function of GPAC 2d7da22e (26.08-DEV). The vulnerability occurs when cloning a PROTO default SFImage field with a NULL source pointer. An attacker can provide a specially crafted input file that triggers the condition, resulting in application crash and denial of service.

CVSS v3
5.5
EG Score
5.5MEDIUMhigh confidence
EG Risk
41
EG Risk 41/100CISA 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
Severity55% × 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
0.2%
EPSS %ILE
5th
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 22, 2026

Last Modified

September 24, 2026

Advisory Details (2)

Auto-updated Sep 23, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
github_commit

commit c748219af596 (makesoftwaresafe/gpac)

Fix landed in makesoftwaresafe/gpac commit c748219af596 — awaiting tagged release

https://github.com/makesoftwaresafe/gpac/commit/c748219af5968fd70f6dc7ebe4d6dd9f495d4425
generic

[Bug]NULL-pointer source in gf_sg_vrml_field_clone() SFImage clone leads to crash when cloning a PROTO default field (CWE-476) · Issue #3855 · gpac/gpac · GitHub

https://github.com/gpac/gpac/issues/3855

Vendor Advisories for CVE-2026-88339(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 35× 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 01:04 UTCEG score recompute
  2. 2026-10-04 01:03 UTCGHSA enrichment
  3. 2026-10-03 00:55 UTCEG score recompute
  4. 2026-10-03 00:55 UTCGHSA enrichment
  5. 2026-10-02 00:47 UTCEG score recompute
  6. 2026-10-02 00:47 UTCGHSA enrichment
  7. 2026-10-01 19:51 UTCEPSS rescore
  8. 2026-10-01 00:34 UTCEG score recompute
  9. 2026-10-01 00:34 UTCGHSA enrichment
  10. 2026-09-30 15:04 UTCEPSS rescore
  11. 2026-09-30 00:20 UTCEG score recompute
  12. 2026-09-30 00:20 UTCGHSA enrichment
  13. 2026-09-28 21:51 UTCEG score recompute
  14. 2026-09-28 21:51 UTCGHSA enrichment
  15. 2026-09-28 13:52 UTCEPSS rescore
  16. 2026-09-27 21:43 UTCEG score recompute
  17. 2026-09-27 21:43 UTCGHSA enrichment
  18. 2026-09-27 13:48 UTCEPSS rescore
  19. 2026-09-26 21:35 UTCEG score recompute
  20. 2026-09-26 21:35 UTCGHSA enrichment
  21. 2026-09-26 15:59 UTCEPSS rescore
  22. 2026-09-25 21:27 UTCGHSA enrichment
  23. 2026-09-24 21:18 UTCGHSA enrichment
  24. 2026-09-24 16:39 UTCEG score recompute
  25. 2026-09-24 16:39 UTCGHSA enrichment
Show 10 more
  1. 2026-09-24 14:04 UTCEPSS rescore
  2. 2026-09-23 17:54 UTCEPSS rescore
  3. 2026-09-23 16:19 UTCEG score recompute
  4. 2026-09-23 16:19 UTCGHSA enrichment
  5. 2026-09-23 15:29 UTCEG score recompute▲ 5.50
  6. 2026-09-23 15:29 UTCGHSA enrichment
  7. 2026-09-23 15:29 UTCMITRE cvelistV5CVSS v3 → 5.5 · severity → MEDIUM
  8. 2026-09-22 20:32 UTCNVD update
  9. 2026-09-22 19:38 UTCEG score recompute
  10. 2026-09-22 19:37 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-88339?
CVE-2026-88339 is a medium vulnerability published on September 22, 2026. A NULL pointer dereference vulnerability exists in the gfsgvrmlfieldclone() function of GPAC 2d7da22e (26.08-DEV). The vulnerability occurs when cloning a PROTO default SFImage field with a NULL source pointer. An attacker can provide a specially crafted input file that triggers the condition,…
When was CVE-2026-88339 disclosed?
CVE-2026-88339 was first published on September 22, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-88339 actively exploited?
CVE-2026-88339 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-88339?
CVE-2026-88339 has a CVSS v3.1 base score of 5.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-88339?
An upstream fix for CVE-2026-88339 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-2026-88339 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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