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CVE Record

CVE-2026-10117: Open5GS nghttp2-server.c ogs_pool_id_calloc denial of service

A weakness has been identified in Open5GS up to 2.7.7. This issue affects the function ogs_pool_id_calloc in the library /lib/sbi/nghttp2-server.c. Executing a manipulation can lead to denial of service. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. It is best practice to apply a patch to resolve this issue.

MediumCVSS 5.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Open5GS versions 2.7.0 through 2.7.7 have a remotely reachable denial-of-service weakness in SBI HTTP/2 server handling. A successful attack can disrupt affected 5G core network functions rather than expose data. Public exploit material is reported, but the provided sources do not show CISA KEV listing or confirmed active exploitation.

Executive priority

Treat this as a near-term availability risk for Open5GS-based mobile core environments. It is not described as data theft or code execution, but public exploit availability raises urgency for exposed or production deployments.

Technical view

The issue is reported in /lib/sbi/nghttp2-server.c, affecting ogs_pool_id_calloc. VulDB maps it to CWE-404 and CVSS 4.0 score 5.3, with network attack vector, low complexity, low privileges, no user interaction, and low availability impact.

Likely exposure

Exposure is most relevant where Open5GS 2.7.0-2.7.7 network functions are deployed and their SBI-related services are reachable by authenticated or low-privileged remote actors. Internet exposure is not established by the sources.

Exploitation context

VulDB reports that exploit material is publicly available and could be used for attacks. The provided bundle does not cite confirmed in-the-wild exploitation, and KEV is false, so active exploitation should not be claimed.

Researcher notes

Evidence is limited to public advisory data and the referenced issue. Do not assume broader product impact, unauthenticated exploitation, or a fixed release unless confirmed by Open5GS guidance. Validate reachability and version exposure before escalation.

Mitigation direction

  • Identify all Open5GS deployments and versions in use.
  • Prioritize upgrading or applying vendor patches when Open5GS guidance identifies the fixed version.
  • Restrict Open5GS service reachability to trusted network peers where architecture permits.
  • Monitor affected network functions for crashes, restarts, or unexplained service degradation.
  • Track Open5GS issue 4474 and VulDB entry 367295 for remediation updates.

Validation and detection

  • Inventory Open5GS instances running versions 2.7.0 through 2.7.7.
  • Confirm affected network functions are not reachable from untrusted networks.
  • Review service logs and health metrics for denial-of-service symptoms.
  • Check vendor issue 4474 for patch or release status.
  • Verify compensating controls limit remote access to expected peers only.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-404: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-10117 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.3 (4.0)
Known Exploited
No
Published

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

4CVSS vectors
6Timeline events
1ADP providers
6Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: noTechnical Impact: partial

CVSS vector scores

4 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.3CVSS 4.0MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P——VulDB
4.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C2.81.4VulDB
4.3CVSS 3.0MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C2.81.4VulDB
4CVSS 2.0MediumAV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C82.9VulDB

Vulnerability scoring details

Base CVSS 4.0 score

5.3Medium
CVSS 4.0 vector shape for CVE-2026-10117Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. Source timelineVulDB

    Advisory disclosed

  2. Source timelineVulDB

    VulDB entry created

  3. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  4. Source timelineVulDB

    VulDB entry last update

  5. CVE publishedCVE Program

    The CVE record was published.

  6. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aOpen5GS2.7.0, 2.7.1, 2.7.2, 2.7.3, 2.7.4, 2.7.5, 2.7.6, 2.7.7Listed
Weakness

CWE details

CWE-404

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-404 · source CWE mapping

Improper Resource Shutdown or Release

Improper Resource Shutdown or Release represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs