CVE-2026-90707

HIGHPre-NVD 8.38.3—
EchelonGraph scoreHIGH confidence

Score 8.3 from GitHub Security Advisory published 2026-09-14. a secondary CVSS source baseline 8.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A security flaw has been discovered in Open5GS up to 2.7.x. Affected is the function amf_nnrf_try_old_amf_discovery_fallback of the file src/amf/nnrf-handler.c of the component Old AMF Discovery Fallback. The manipulation of the argument discovery_option results in use after free. The attack may be performed from remote. The patch is identified as ddd683a35f8aaac2b7b9884a24cd53bddfc65238. Applying a patch is advised to resolve this issue.

CVSS v3
8.3
EG Score
8.3(high)
EG Risk
52(Track)
EG Risk 52/100SSVC: Track

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
Severity83% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

September 14, 2026

Last Modified

September 15, 2026

Advisory Details (3)

Auto-updated Sep 14, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
generic

GitHub - open5gs/open5gs: Open5GS is a C-language Open Source implementation for 5G Core and EPC, i.e. the core network of LTE/NR network (Release-19) · GitHub

https://github.com/open5gs/open5gs/
github_commit

commit ddd683a35f8a (open5gs/open5gs)

Fix landed in open5gs/open5gs commit ddd683a35f8a — awaiting tagged release

https://github.com/open5gs/open5gs/commit/ddd683a35f8aaac2b7b9884a24cd53bddfc65238
github_pr

amf: fix use after free in amf_nnrf_handle_failed_amf_discovery

Upstream fix in progress (PR #4698 · open5gs/open5gs, state=open)

https://github.com/open5gs/open5gs/pull/4698

Vendor Advisories for CVE-2026-90707(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 27× in last 7d / 27× 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. 2026-09-20 10:45 UTCGHSA enrichment
  2. 2026-09-19 22:16 UTCEG score recompute
  3. 2026-09-19 22:16 UTCGHSA enrichment
  4. 2026-09-19 09:45 UTCGHSA enrichment
  5. 2026-09-18 21:16 UTCEG score recompute
  6. 2026-09-18 21:16 UTCGHSA enrichment
  7. 2026-09-18 19:28 UTCEPSS rescore
  8. 2026-09-18 08:03 UTCGHSA enrichment
  9. 2026-09-17 19:33 UTCEG score recompute
  10. 2026-09-17 19:33 UTCGHSA enrichment
  11. 2026-09-17 19:32 UTCEPSS rescore
  12. 2026-09-17 04:07 UTCGHSA enrichment
  13. 2026-09-16 15:35 UTCEG score recompute
  14. 2026-09-16 15:35 UTCGHSA enrichment
  15. 2026-09-16 14:09 UTCEPSS rescore
  16. 2026-09-16 05:15 UTCEPSS rescore
  17. 2026-09-16 03:05 UTCGHSA enrichment
  18. 2026-09-15 14:35 UTCEG score recompute
  19. 2026-09-15 14:35 UTCGHSA enrichment
  20. 2026-09-15 14:03 UTCEG score recompute
  21. 2026-09-15 14:03 UTCGHSA enrichment
  22. 2026-09-15 09:34 UTCGHSA enrichment
  23. 2026-09-14 21:04 UTCEG score recompute
  24. 2026-09-14 21:04 UTCGHSA enrichment
  25. 2026-09-14 11:21 UTCEG score recompute
Show 2 more
  1. 2026-09-14 10:55 UTCEG score recompute
  2. 2026-09-14 10:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-90707?
CVE-2026-90707 is a high vulnerability published on September 14, 2026. A security flaw has been discovered in Open5GS up to 2.7.x. Affected is the function amfnnrftryoldamfdiscoveryfallback of the file src/amf/nnrf-handler.c of the component Old AMF Discovery Fallback. The manipulation of the argument discovery_option results in use after free. The attack may be…
When was CVE-2026-90707 disclosed?
CVE-2026-90707 was first published in the National Vulnerability Database on September 14, 2026, with the most recent update on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90707 actively exploited?
CVE-2026-90707 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 75.5% of all scored CVEs.
What is the CVSS score of CVE-2026-90707?
CVE-2026-90707 has a CVSS v3 base score of 8.3 (NVD).
How do I remediate CVE-2026-90707?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-90707, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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