A weakness has been identified in Open5GS up to 2.7.7. This vulnerability affects the function ogs_pfcp_xact_local_create of the file src/upf/gtp-path.c of the component GTP-U Receive Path. This manipulation causes allocation of resources. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. Patch name: 9ffc252482d9b03ac01abcedbe95497ff4f95dd0. It is recommended to apply a patch to fix this issue.
CVE-2026-107166
MEDIUMPre-NVD 5.35.3Trending — 3 sources updated this week
EchelonGraph scoreLOW confidence
This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: secondary
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 5.3Exploit: None knownExposed services: Not assessed
An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.
- CVSS v3
- 5.3
- EG Score
- 5.3MEDIUMlow confidence
- EG Risk
- 28EG Risk 28/100CISA 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 computedSeverity53% × 45%Exploitation0% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track or Attend 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 at low or medium mission impact and sooner than that at high until it ships, then apply the release. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track or Attend 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 at low or medium mission impact and sooner than that at high until it ships, then apply the release.
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). 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
October 7, 2026
Last Modified
October 7, 2026
Advisory Details (4)
Auto-updated Oct 7, 2026Upstream 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 9ffc252482d9 (open5gs/open5gs)
Fix landed in open5gs/open5gs commit 9ffc252482d9 — awaiting tagged release
https://github.com/open5gs/open5gs/commit/9ffc252482d9b03ac01abcedbe95497ff4f95dd0github_pr
[UPF/SGWU] Handle PFCP session report failures
Fix merged in open5gs/open5gs PR #4806 on 2026-09-22 — awaiting tagged release
https://github.com/open5gs/open5gs/pull/4806generic
[Bug]: UPF crash via PFCP transaction/timer exhaustion triggered by repeated GTP-U Error Indications · Issue #4792 · open5gs/open5gs · GitHub
https://github.com/open5gs/open5gs/issues/4792Vendor Advisories for CVE-2026-107166(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 4× in last 7d / 4× 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.
- 2026-10-07 16:38 UTCEG score recompute
- 2026-10-07 16:32 UTCNVD updateCVSS v4 → 5.5
- 2026-10-07 16:07 UTCEG score recompute
- 2026-10-07 16:06 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-400 · CWE-770
Frequently asked(4)
What is CVE-2026-107166?
CVE-2026-107166 is a medium vulnerability published on October 7, 2026. A weakness has been identified in Open5GS up to 2.7.7. This vulnerability affects the function ogspfcpxactlocalcreate of the file src/upf/gtp-path.c of the component GTP-U Receive Path. This manipulation causes allocation of resources. The attack is possible to be carried out remotely. The exploit…
When was CVE-2026-107166 disclosed?
CVE-2026-107166 was first published on October 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-107166?
CVE-2026-107166 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-107166?
An upstream fix for CVE-2026-107166 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-2026-107166 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-107166
Is Your Infrastructure Affected by CVE-2026-107166?
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