CVE-2026-82587

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory (severity: LOW) published 2026-08-30. 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: 1%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 vulnerability was determined in Open5GS up to 2.7.7. This vulnerability affects the function amf_namf_comm_decode_ue_mm_context_list of the file src/amf/namf-handler.c of the component AMF. This manipulation of the argument ueContext.mmContextList[*].allowedNssai causes memory corruption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 2.8.0 is able to resolve this issue. Patch name: abf8a836564b966b5141110fc25ed413c4f17522. It is recommended 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
1%
EPSS %ILE
43%
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.
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
generic

AMF crash on old-AMF `Namf_Communication` `/transfer` response with oversized `ueContext.mmContextList[*].allowedNssai` · Issue #4398 · open5gs/open5gs · GitHub

https://github.com/open5gs/open5gs/issues/4398
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

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/

Vendor Advisories for CVE-2026-82587(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 17× in last 7d / 73× 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. 2026-09-24 19:20 UTCEG score recompute
  2. 2026-09-24 19:20 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 19:51 UTCGHSA enrichment
  5. 2026-09-22 19:26 UTCEG score recompute
  6. 2026-09-22 19:26 UTCGHSA enrichment
  7. 2026-09-22 16:01 UTCEPSS rescore
  8. 2026-09-21 21:09 UTCEPSS rescore
  9. 2026-09-21 19:54 UTCGHSA enrichment
  10. 2026-09-20 20:25 UTCEG score recompute
  11. 2026-09-20 20:25 UTCGHSA enrichment
  12. 2026-09-20 20:16 UTCEPSS rescore
  13. 2026-09-19 20:56 UTCEG score recompute
  14. 2026-09-19 20:56 UTCGHSA enrichment
  15. 2026-09-18 21:27 UTCEG score recompute
  16. 2026-09-18 21:27 UTCGHSA enrichment
  17. 2026-09-18 19:28 UTCEPSS rescore
  18. 2026-09-17 20:58 UTCEG score recompute
  19. 2026-09-17 20:58 UTCGHSA enrichment
  20. 2026-09-16 21:29 UTCEG score recompute
  21. 2026-09-16 21:29 UTCGHSA enrichment
  22. 2026-09-16 14:08 UTCEPSS rescore
  23. 2026-09-16 05:15 UTCEPSS rescore
  24. 2026-09-15 21:15 UTCEG score recompute
  25. 2026-09-15 21:15 UTCGHSA enrichment
Show 48 more
  1. 2026-09-15 03:12 UTCEPSS rescore
  2. 2026-09-15 03:12 UTCEPSS rescore
  3. 2026-09-14 21:46 UTCGHSA enrichment
  4. 2026-09-13 22:17 UTCEG score recompute
  5. 2026-09-13 22:17 UTCGHSA enrichment
  6. 2026-09-12 22:48 UTCEG score recompute
  7. 2026-09-12 22:48 UTCGHSA enrichment
  8. 2026-09-11 23:19 UTCEG score recompute
  9. 2026-09-11 23:19 UTCGHSA enrichment
  10. 2026-09-11 14:53 UTCEPSS rescore
  11. 2026-09-11 14:53 UTCEPSS rescore
  12. 2026-09-10 23:19 UTCEG score recompute
  13. 2026-09-10 23:19 UTCGHSA enrichment
  14. 2026-09-09 23:50 UTCGHSA enrichment
  15. 2026-09-08 23:36 UTCEG score recompute
  16. 2026-09-08 23:36 UTCGHSA enrichment
  17. 2026-09-08 22:01 UTCEPSS rescore
  18. 2026-09-07 17:38 UTCEG score recompute
  19. 2026-09-07 17:38 UTCGHSA enrichment
  20. 2026-09-06 18:09 UTCEG score recompute
  21. 2026-09-06 18:09 UTCGHSA enrichment
  22. 2026-09-06 13:48 UTCEPSS rescore
  23. 2026-09-05 18:39 UTCEG score recompute
  24. 2026-09-05 18:39 UTCGHSA enrichment
  25. 2026-09-05 15:31 UTCEPSS rescore
  26. 2026-09-04 19:11 UTCEG score recompute
  27. 2026-09-04 19:11 UTCGHSA enrichment
  28. 2026-09-04 05:07 UTCEPSS rescore
  29. 2026-09-03 19:42 UTCGHSA enrichment
  30. 2026-09-02 20:13 UTCEG score recompute
  31. 2026-09-02 20:12 UTCGHSA enrichment
  32. 2026-09-02 14:12 UTCEPSS rescore
  33. 2026-09-01 20:36 UTCEG score recompute
  34. 2026-09-01 20:36 UTCGHSA enrichment
  35. 2026-09-01 13:54 UTCEPSS rescore
  36. 2026-09-01 04:40 UTCEPSS rescore
  37. 2026-09-01 04:40 UTCEPSS rescore
  38. 2026-08-31 21:08 UTCGHSA enrichment
  39. 2026-08-31 17:24 UTCEG score recompute
  40. 2026-08-31 17:24 UTCGHSA enrichment
  41. 2026-08-31 17:20 UTCNVD updateCVSS v4 → 2.1
  42. 2026-08-31 16:32 UTCEG score recompute
  43. 2026-08-31 16:32 UTCGHSA enrichment
  44. 2026-08-31 16:29 UTCMITRE cvelistV5CVSS v4 → 5.3
  45. 2026-08-30 19:28 UTCEG score recompute
  46. 2026-08-30 19:27 UTCNVD updateCVSS v4 → 2.1
  47. 2026-08-30 19:14 UTCEG score recompute
  48. 2026-08-30 19:14 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-82587?
CVE-2026-82587 is a medium vulnerability published on August 30, 2026. A vulnerability was determined in Open5GS up to 2.7.7. This vulnerability affects the function amfnamfcommdecodeuemmcontext_list of the file src/amf/namf-handler.c of the component AMF. This manipulation of the argument ueContext.mmContextList[*].allowedNssai causes memory corruption. The attack…
When was CVE-2026-82587 disclosed?
CVE-2026-82587 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-2026-82587 actively exploited?
CVE-2026-82587 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.7% of all scored CVEs.
What is the CVSS score of CVE-2026-82587?
CVE-2026-82587 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-82587?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82587, 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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