CVE-2026-82589

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory (severity: LOW) published 2026-08-31. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: Elevated riskExposed: 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 2.7.7. Impacted is the function amf_namf_comm_handle_n1_n2_message_transfer of the file src/amf/namf-handler.c of the component N1-N2 Message Handler. Performing a manipulation of the argument N1N2MessageTransferReqData.n2InfoContainer.smInfo.n2InfoContent.ngapIeType results in denial of service. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 2.8.0 is recommended to address this issue. The patch is named abf8a836564b966b5141110fc25ed413c4f17522. It is advisable to upgrade the affected component.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

August 30, 2026

Last Modified

August 31, 2026

Advisory Details (4)

Auto-updated Aug 30, 2026
Patch available. Sources: github_commit, github_release.
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_release Patch Available

v2.8.0 - Release-19

Patch available: open5gs/open5gs v2.8.0

https://github.com/open5gs/open5gs/releases/tag/v2.8.0
github_commit Patch Available

commit abf8a836564b (open5gs/open5gs)

Patch available: open5gs/open5gs v2.8.0 (contains commit abf8a836564b)

https://github.com/open5gs/open5gs/commit/abf8a836564b966b5141110fc25ed413c4f17522
generic

[Bug]: AMF crash on `POST /namf-comm/v1/ue-contexts/{supi}/n1-n2-messages` with supported-but-unimplemented `n2InfoContainer.smInfo.n2InfoContent.ngapIeType` · Issue #4396 · open5gs/open5gs · GitHub

https://github.com/open5gs/open5gs/issues/4396

Vendor Advisories for CVE-2026-82589(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 19× in last 7d / 60× 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. 2026-09-19 09:03 UTCEG score recompute
  2. 2026-09-19 09:03 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 08:23 UTCEG score recompute
  5. 2026-09-18 08:23 UTCGHSA enrichment
  6. 2026-09-17 07:41 UTCEG score recompute
  7. 2026-09-17 07:41 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 07:01 UTCEG score recompute
  10. 2026-09-16 07:01 UTCGHSA enrichment
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 06:22 UTCEG score recompute
  13. 2026-09-15 06:22 UTCGHSA enrichment
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-14 05:43 UTCEG score recompute
  17. 2026-09-14 05:43 UTCGHSA enrichment
  18. 2026-09-13 05:04 UTCEG score recompute
  19. 2026-09-13 05:04 UTCGHSA enrichment
  20. 2026-09-12 04:25 UTCEG score recompute
  21. 2026-09-12 04:25 UTCGHSA enrichment
  22. 2026-09-11 14:53 UTCEPSS rescore
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-11 03:45 UTCEG score recompute
  25. 2026-09-11 03:45 UTCGHSA enrichment
Show 35 more
  1. 2026-09-10 03:06 UTCGHSA enrichment
  2. 2026-09-09 02:26 UTCEG score recompute
  3. 2026-09-09 02:25 UTCGHSA enrichment
  4. 2026-09-08 22:01 UTCEPSS rescore
  5. 2026-09-08 01:44 UTCEG score recompute
  6. 2026-09-08 01:44 UTCGHSA enrichment
  7. 2026-09-07 01:05 UTCEG score recompute
  8. 2026-09-07 01:05 UTCGHSA enrichment
  9. 2026-09-06 13:48 UTCEPSS rescore
  10. 2026-09-06 00:24 UTCEG score recompute
  11. 2026-09-06 00:24 UTCGHSA enrichment
  12. 2026-09-05 15:31 UTCEPSS rescore
  13. 2026-09-04 23:45 UTCEG score recompute
  14. 2026-09-04 23:45 UTCGHSA enrichment
  15. 2026-09-04 05:07 UTCEPSS rescore
  16. 2026-09-03 23:06 UTCGHSA enrichment
  17. 2026-09-02 22:26 UTCEG score recompute
  18. 2026-09-02 22:26 UTCGHSA enrichment
  19. 2026-09-02 14:12 UTCEPSS rescore
  20. 2026-09-01 21:46 UTCEG score recompute
  21. 2026-09-01 21:46 UTCGHSA enrichment
  22. 2026-09-01 13:54 UTCEPSS rescore
  23. 2026-09-01 04:40 UTCEPSS rescore
  24. 2026-09-01 04:40 UTCEPSS rescore
  25. 2026-08-31 21:07 UTCGHSA enrichment
  26. 2026-08-31 18:30 UTCEG score recompute
  27. 2026-08-31 18:29 UTCGHSA enrichment
  28. 2026-08-31 18:20 UTCNVD updateCVSS v4 → 2.1
  29. 2026-08-31 17:24 UTCEG score recompute
  30. 2026-08-31 17:24 UTCGHSA enrichment
  31. 2026-08-31 17:19 UTCMITRE cvelistV5CVSS v4 → 5.3
  32. 2026-08-30 23:27 UTCEG score recompute
  33. 2026-08-30 23:27 UTCNVD updateCVSS v4 → 2.1
  34. 2026-08-30 22:22 UTCEG score recompute
  35. 2026-08-30 22:22 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-82589?
CVE-2026-82589 is a medium vulnerability published on August 30, 2026. A security flaw has been discovered in Open5GS up to 2.7.7. Impacted is the function amfnamfcommhandlen1n2message_transfer of the file src/amf/namf-handler.c of the component N1-N2 Message Handler. Performing a manipulation of the argument…
When was CVE-2026-82589 disclosed?
CVE-2026-82589 was first published in the National Vulnerability Database on August 30, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82589 actively exploited?
CVE-2026-82589 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 76.0% of all scored CVEs.
What is the CVSS score of CVE-2026-82589?
CVE-2026-82589 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-82589?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82589, 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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