CVE-2026-82590

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory 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 week
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: None knownExposed: 0

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

A weakness has been identified in Open5GS up to 2.7.7. The affected element is the function smf_nudm_sdm_handle_get of the file src/smf/nudm-handler.c of the component SMF. Executing a manipulation of the argument preemptCap can lead to reachable assertion. The attack may be launched remotely. Upgrading to version 2.8.0 is sufficient to fix this issue. This patch is called 4554405f29bffd7562abedbee63484825bd90cd5. You should upgrade the affected component.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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%
Exploitation0% × 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 4554405f29bf (open5gs/open5gs)

Patch available: open5gs/open5gs v2.8.0 (contains commit 4554405f29bf)

https://github.com/open5gs/open5gs/commit/4554405f29bffd7562abedbee63484825bd90cd5
generic

[Bug]: SMF crash on `nudm-sdm` `sm-data` response with invalid `_5gQosProfile.arp.preemptCap` · Issue #4455 · open5gs/open5gs · GitHub

https://github.com/open5gs/open5gs/issues/4455

Vendor Advisories for CVE-2026-82590(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 / 57× 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 08:45 UTCEG score recompute
  2. 2026-09-19 08:45 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 08:07 UTCEG score recompute
  5. 2026-09-18 08:07 UTCGHSA enrichment
  6. 2026-09-17 07:33 UTCEG score recompute
  7. 2026-09-17 07:33 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 06:58 UTCEG score recompute
  10. 2026-09-16 06:58 UTCGHSA enrichment
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 06:25 UTCEG score recompute
  13. 2026-09-15 06:25 UTCGHSA enrichment
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-14 05:51 UTCEG score recompute
  17. 2026-09-14 05:51 UTCGHSA enrichment
  18. 2026-09-13 05:17 UTCEG score recompute
  19. 2026-09-13 05:17 UTCGHSA enrichment
  20. 2026-09-12 04:43 UTCEG score recompute
  21. 2026-09-12 04:43 UTCGHSA enrichment
  22. 2026-09-11 14:53 UTCEPSS rescore
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-11 04:09 UTCEG score recompute
  25. 2026-09-11 04:09 UTCGHSA enrichment
Show 32 more
  1. 2026-09-10 03:35 UTCGHSA enrichment
  2. 2026-09-09 03:01 UTCEG score recompute
  3. 2026-09-09 03:01 UTCGHSA enrichment
  4. 2026-09-08 22:01 UTCEPSS rescore
  5. 2026-09-08 02:28 UTCGHSA enrichment
  6. 2026-09-07 01:53 UTCEG score recompute
  7. 2026-09-07 01:53 UTCGHSA enrichment
  8. 2026-09-06 13:48 UTCEPSS rescore
  9. 2026-09-06 01:13 UTCEG score recompute
  10. 2026-09-06 01:13 UTCGHSA enrichment
  11. 2026-09-05 15:31 UTCEPSS rescore
  12. 2026-09-05 00:39 UTCEG score recompute
  13. 2026-09-05 00:39 UTCGHSA enrichment
  14. 2026-09-04 05:07 UTCEPSS rescore
  15. 2026-09-04 00:03 UTCGHSA enrichment
  16. 2026-09-02 23:29 UTCEG score recompute
  17. 2026-09-02 23:29 UTCGHSA enrichment
  18. 2026-09-02 14:12 UTCEPSS rescore
  19. 2026-09-01 22:55 UTCEG score recompute
  20. 2026-09-01 22:55 UTCGHSA enrichment
  21. 2026-09-01 13:54 UTCEPSS rescore
  22. 2026-09-01 04:40 UTCEPSS rescore
  23. 2026-09-01 04:40 UTCEPSS rescore
  24. 2026-08-31 22:21 UTCEG score recompute
  25. 2026-08-31 22:21 UTCGHSA enrichment
  26. 2026-08-31 22:15 UTCEG score recompute
  27. 2026-08-31 22:15 UTCGHSA enrichment
  28. 2026-08-31 21:07 UTCEG score recompute
  29. 2026-08-31 21:07 UTCGHSA enrichment
  30. 2026-08-30 23:27 UTCEG score recompute
  31. 2026-08-30 22:37 UTCEG score recompute
  32. 2026-08-30 22:37 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-82590?
CVE-2026-82590 is a medium vulnerability published on August 30, 2026. A weakness has been identified in Open5GS up to 2.7.7. The affected element is the function smfnudmsdmhandleget of the file src/smf/nudm-handler.c of the component SMF. Executing a manipulation of the argument preemptCap can lead to reachable assertion. The attack may be launched remotely.…
When was CVE-2026-82590 disclosed?
CVE-2026-82590 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-2026-82590 actively exploited?
CVE-2026-82590 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-2026-82590?
CVE-2026-82590 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-82590?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82590, 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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