free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's PCF POST /npcf-policyauthorization/v1/app-sessions handler panics on a single authenticated request whose ascReqData.suppFeat == "1" (enabling traffic-routing feature negotiation) and whose medComponents entries supply an afAppId but NO AfRoutReq. The create path then calls provisioningOfTrafficRoutingInfo(smPolicy, appID, routeReq, ...) with routeReq == nil and dereferences routeReq.RouteToLocs (and other fields) without a nil check, causing runtime error: invalid memory address or nil pointer dereference. Gin recovery converts the panic into HTTP 500. This vulnerability is fixed in 4.2.2.
CVE-2026-44317
“—” beside the score: it is equal to NVD's CVSS score.
This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.6% (46th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
- CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
A fix is available — apply it.
- CVSS v3
- 6.5
- EG Score
- 6.5MEDIUMmedium confidence
- EG Risk
- 45EG Risk 45/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity65% × 45%Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.6%
- EPSS %ILE
- 46th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
- EG Likelihood
- 0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
May 27, 2026
Last Modified
October 14, 2026
Advisory Details (4)
Auto-updated Jun 14, 2026PCF npcf-policyauthorization POST /app-sessions panics on suppFeat=1 with missing AfRoutReq via nil pointer dereference · Advisory · free5gc/free5gc · GitHub
https://github.com/free5gc/free5gc/security/advisories/GHSA-wwqh-7jm5-gj7wfix(policyauth): prevent nil AfRoutReq panic in app-session create when suppFeat enables traffic routing
Patch available: free5gc/pcf v1.4.3 (PR #65 merged 2026-03-17)
https://github.com/free5gc/pcf/pull/65commit 508d70b8527a (free5gc/pcf)
Patch available: free5gc/pcf v1.4.3 (contains commit 508d70b8527a)
https://github.com/free5gc/pcf/commit/508d70b8527a6c8c923179dad450ea01e16b6aeb[Bugs] PCF `npcf-policyauthorization` POST /app-sessions can panic on valid suppFeat=1 requests, causing denial of service · Issue #879 · free5gc/free5gc · GitHub
https://github.com/free5gc/free5gc/issues/879Vendor Advisories for CVE-2026-44317(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
Go(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| github.com/free5gc/pcf | — |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 30× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 100 of 176 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 76 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-18 03:39 UTCEG score recompute
- 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-14 20:37 UTCEG score recompute
- 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-12 16:05 UTCEG score recompute
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- 2026-10-11 14:27 UTCEG score recompute
- 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 45th percentile
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- 2026-10-03 16:49 UTCOSV refresh
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 45th percentile
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- 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 28th percentile
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- 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-14 07:37 UTCEG score recompute
- 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-13 03:09 UTCOSV refresh
- 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
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- 2026-08-25 05:15 UTCEG score recompute
- 2026-08-23 14:59 UTCEG score recompute
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-08-21 20:32 UTCEG score recompute
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- 2026-08-20 11:17 UTCEG score recompute
- 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
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- 2026-08-17 09:15 UTCEG score recompute
- 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 28th percentile
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- 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 28th percentile
- 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-08-14 01:25 UTCEG score recompute
- 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-08-12 23:59 UTCEG score recompute
- 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-08-12 00:07 UTCEG score recompute
- 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-08-11 00:11 UTCEG score recompute
- 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-08-09 21:04 UTCEG score recompute
- 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-08-08 21:12 UTCEG score recompute
- 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-08-07 20:37 UTCEG score recompute
- 2026-08-06 20:44 UTCEG score recompute
- 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-08-05 20:52 UTCEG score recompute
- 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.4% · 27th percentile
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- 2026-08-03 16:26 UTCEG score recompute
- 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-08-02 15:03 UTCEG score recompute
- 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-08-01 15:10 UTCEG score recompute
- 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-07-31 07:29 UTCEG score recompute
- 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-07-29 15:03 UTCEG score recompute
- 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.4% · 27th percentile
- 2026-07-27 10:09 UTCEG score recompute
Related CVEs(same product + same CWE)
Same product
4 shownGo:github.com/free5gc/pcf
Frequently asked(5)
What is CVE-2026-44317?
When was the CVE record for CVE-2026-44317 published?
Is CVE-2026-44317 actively exploited?
What is the CVSS score of CVE-2026-44317?
How do I remediate CVE-2026-44317?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-44317
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