CVE-2026-44325— free5GC: NRF POST /oauth2/token structured-form parser type-confusion panic family (Reflect.Set on incompatible types)
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-44325
Vulnerability Information
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Vulnerability Title
free5GC: NRF POST /oauth2/token structured-form parser type-confusion panic family (Reflect.Set on incompatible types)
Source: NVD (National Vulnerability Database)
Vulnerability Description
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NRF root SBI endpoint POST /oauth2/token contains a parser-level type-confusion bug family. The handler in NFs/nrf/internal/sbi/api_accesstoken.go reflects over models.NrfAccessTokenAccessTokenReq, special-cases only plain string and NrfNfManagementNfType fields, and treats every other field as if it were a single models.PlmnId. The parsed *models.PlmnId is then assigned with reflect.Value.Set() to whichever field name the attacker put in the form body, which panics whenever the destination field's real type is incompatible (slice, different struct, primitive). Gin recovery converts each panic into HTTP 500, but the endpoint remains remotely panicable from a single unauthenticated form-encoded request and is repeatedly triggerable. This vulnerability is fixed in 4.2.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-44325
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Patches & Fixes for CVE-2026-44325 (2)
Vendor Advisories for CVE-2026-44325 (1)
Other References for CVE-2026-44325 (1)
Same Patch Batch · free5gc · 2026-05-27 · 20 CVEs total
| CVE-2026-44327 | 10.0 CRITICAL | free5GC: NEF nnef-oam route group is unauthenticated; no-token requests reach the OAM hand |
| CVE-2026-44329 | 10.0 CRITICAL | free5GC: SMF UPI management interface lacks auth middleware; unauthenticated topology read |
| CVE-2026-44330 | 10.0 CRITICAL | free5GC: NEF nnef-pfdmanagement API is unauthenticated; forged bearer tokens can read PFD |
| CVE-2026-44326 | 9.4 CRITICAL | free5GC: NEF 3gpp-traffic-influence API is unauthenticated; missing or forged bearer token |
| CVE-2026-44315 | 9.4 CRITICAL | free5GC: NEF 3gpp-pfd-management API is unauthenticated; forged bearer tokens can create, |
| CVE-2026-42083 | 8.2 HIGH | free5GC: PCF Npcf_SMPolicyControl missing authentication middleware allows unauthenticated |
| CVE-2026-44328 | 8.2 HIGH | free5GC: SMF UPI DELETE /upi/v1/upNodesLinks/{ref} panics on AN-node deletion via nil UPF |
| CVE-2026-44322 | 7.5 HIGH | free5GC: NEF 3gpp-pfd-management PATCH applications/{appId} panics on UDR access failure d |
| CVE-2026-44316 | 7.5 HIGH | free5GC: PCF npcf-smpolicycontrol POST /sm-policies panics on downstream UDR/OpenAPI 404 v |
| CVE-2026-44319 | 7.5 HIGH | free5GC: NEF crashes via logger.Fatal on PFD notification delivery failure (attacker-contr |
| CVE-2026-44321 | 7.5 HIGH | free5GC: SMF UPI POST /upi/v1/upNodesLinks exits the SMF process on overlapping UE pools ( |
| CVE-2026-44320 | 7.3 HIGH | free5GC: NEF nnef-callback route group is unauthenticated; forged callback requests are ac |
| CVE-2026-44324 | 6.5 MEDIUM | free5GC: UDR nudr-dr DELETE amf-subscriptions panics on missing UE state via nil interface |
| CVE-2026-44317 | 6.5 MEDIUM | free5GC: PCF npcf-policyauthorization POST /app-sessions panics on suppFeat=1 with missing |
| CVE-2026-44318 | 6.5 MEDIUM | free5GC: BSF concurrent PUT /nbsf-management/v1/subscriptions/{subId} crashes the BSF proc |
| CVE-2026-42081 | 6.1 MEDIUM | free5GC: UE Security Capability bypass on NGAP PathSwitchRequest |
| CVE-2026-44323 | 4.3 MEDIUM | free5GC: UDR nudr-dr DELETE amf-subscriptions panics on missing subsId when UE state exist |
| CVE-2026-42082 | 3.7 LOW | free5GC: Missing Concurrent NAS SMC Validation During NGAP Handover |
| CVE-2026-42459 | free5GC: Improper Input Validation and Generation of Error Message Containing Sensitive In |
IV. Related Vulnerabilities
Same product: free5gc
- CVE-2026-42081
free5GC: UE Security Capability bypass on NGAP PathSwitchReq - CVE-2026-42082
free5GC: Missing Concurrent NAS SMC Validation During NGAP H - CVE-2026-42083
free5GC: PCF Npcf_SMPolicyControl missing authentication mid - CVE-2026-42459
free5GC: Improper Input Validation and Generation of Error M - CVE-2026-44315
free5GC: NEF 3gpp-pfd-management API is unauthenticated; for
Same vendor: free5gc
- CVE-2026-42081
free5GC: UE Security Capability bypass on NGAP PathSwitchReq - CVE-2026-42082
free5GC: Missing Concurrent NAS SMC Validation During NGAP H - CVE-2026-42083
free5GC: PCF Npcf_SMPolicyControl missing authentication mid - CVE-2026-42459
free5GC: Improper Input Validation and Generation of Error M - CVE-2026-44315
free5GC: NEF 3gpp-pfd-management API is unauthenticated; for
Same weakness: CWE-20
- CVE-2026-45076
Synapse pagination denial of service - CVE-2026-45137
Anchor: Program<'info, System> is not properly validated - CVE-2026-42553
Cinny: Access token disclosure via invalidated emoji pack av - CVE-2026-5509
Arbitrary Command Injection via Browser Developer Console in - CVE-2026-42459
free5GC: Improper Input Validation and Generation of Error M
V. Comments for CVE-2026-44325
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