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CVE-2026-49397

Nezha Monitoring: Private services (`EnableShowInService: false`) are enumerable via per-server endpoints, leaking name and timing data

5.3 MediumFix available

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.0 to before version 2.0.14, private services (EnableShowInService: false) are enumerable via per-server endpoints, leaking name and timing data. This issue has been patched in version 2.0.14.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
None

Exploit likelihood

0.30%Up 0.3 points since Jun 12, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.3

Nezha Monitoring: Private services (`EnableShowInService: false`) are enumerable via per-server endpoints, leaking name and timing data

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.0 to before version 2.0.14, private services (EnableShowInService: false) are enumerable via per-server endpoints, leaking name and timing data. This issue has been patched in version 2.0.14.

Record
CVE-2026-49397
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-200, CWE-285, CWE-863
Updated
2026-11-02
EUVDEUVD-2026-36597 5.3

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.0 to before version 2.0.14, private services (EnableShowInService: false) are enumerable via per-server endpoints, leaking name and timing data. This issue has been patched in version 2.0.14.

Record
EUVD-2026-36597
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-vrmh-5mmx-hjwx 5.3

Nezha's private services (`EnableShowInService: false`) are enumerable via per-server endpoints, leaking name and timing data

Private services (EnableShowInService: false) are enumerable via per-server endpoints, leaking name and timing data

CWE: CWE-285 (Improper Authorization) via CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) and CWE-863 (Incorrect Authorization — inconsistent gating across data-reader paths)

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N → 5.3 (Medium)

Summary

The EnableShowInService flag on a Service is meant to gate that service's visibility from the public dashboard. The main service-listing endpoint (GET /api/v1/service → showService) correctly filters services with EnableShowInService: false via ServiceSentinel.CopyStats() (service/singleton/servicesentinel.go:421-438). However, two adjacent reader endpoints retrieve service objects through code paths that do not honor the same flag:

  • GET /api/v1/server/:id/service (listServerServices) iterates ServiceSentinel.GetSortedList() (which returns every service regardless of visibility) and emits service ID, name, and timing data for any service monitoring the queried server.
  • GET /api/v1/service/:id/history (getServiceHistory) calls ServiceSentinel.Get(serviceID) directly and emits the service name (and aggregated per-server stats for servers the viewer can see).

Both endpoints are mounted on the optionalAuth group, so an unauthenticated visitor can enumerate hidden services as long as they can guess a public server ID (linear scan over a small numeric ID space) or a service ID (likewise). The service owner's intent — "hide this from the public" via EnableShowInService: false — is silently bypassed.

Affected

  • nezha master at HEAD 636f4a99e6c3d8d75f17fdf7ad55d4ee0f73f1c0 (the audit checkout)
  • All recent 2.x releases that share this code path (post the EnableShowInService filter introduction at CopyStats)

Vulnerability details

[A] — single-source-of-truth filter exists at the listing site

service/singleton/servicesentinel.go:421-438:

func (ss *ServiceSentinel) CopyStats() map[uint64]model.ServiceResponseItem {
    var stats map[uint64]*serviceResponseItem
    copier.Copy(&stats, ss.LoadStats())

    sri := make(map[uint64]model.ServiceResponseItem)
    for k, service := range stats {
        if !service.service.EnableShowInService {       // [A] filter here
            delete(stats, k)
            continue
        }
        service.ServiceName = service.service.Name
        sri[k] = service.ServiceResponseItem
    }
    return sri
}

CopyStats() is the only reader that respects EnableShowInService. Get() and GetSortedList() immediately below it return the raw services with no such filter:

func (ss *ServiceSentinel) Get(id uint64) (s *model.Service, ok bool) {
    ss.servicesLock.RLock(); defer ss.servicesLock.RUnlock()
    s, ok = ss.services[id]
    return                                              // [A'] no EnableShowInService check
}

[B] — listServerServices iterates GetSortedList() and emits hidden services

cmd/dashboard/controller/service.go:258-340 (GET /api/v1/server/:id/service):

func listServerServices(c *gin.Context) ([]*model.ServiceInfos, error) {
    // ... server existence + userCanViewServer check ...
    services := singleton.ServiceSentinelShared.GetSortedList()      // [B] all services, no filter

    for _, service := range services {
        if service.Cover == model.ServiceCoverAll {
            if service.SkipServers[serverID] { continue }
        } else {
            if !service.SkipServers[serverID] { continue }
        }
        // ... fetch history ...
        infos := &model.ServiceInfos{
            ServiceID:   service.ID,
            ServerID:    serverID,
            ServiceName: service.Name,                  // [B'] leaked
            ServerName:  server.Name,
            // ... timing data ...
        }
        result = append(result, infos)
    }
    return result, nil…
Record
GHSA-vrmh-5mmx-hjwx
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-200, CWE-285, CWE-863
Updated
2026-11-02
NVD 5.3

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.0 to before version 2.0.14, private services (EnableShowInService: false) are enumerable via per-server endpoints, leaking name and timing data. This issue has been patched in version 2.0.14.

Record
CVE-2026-49397
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-200, CWE-285, CWE-863
Updated
2026-11-02
OSV 5.3

Nezha Monitoring: Private services (`EnableShowInService: false`) are enumerable via per-server endpoints, leaking name and timing data

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.0 to before version 2.0.14, private services (EnableShowInService: false) are enumerable via per-server endpoints, leaking name and timing data. This issue has been patched in version 2.0.14.

Record
CVE-2026-49397
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-200, CWE-285, CWE-863
Updated
2026-11-02
OSVGHSA-vrmh-5mmx-hjwx 5.3

Nezha's private services (`EnableShowInService: false`) are enumerable via per-server endpoints, leaking name and timing data

Private services (EnableShowInService: false) are enumerable via per-server endpoints, leaking name and timing data

CWE: CWE-285 (Improper Authorization) via CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) and CWE-863 (Incorrect Authorization — inconsistent gating across data-reader paths)

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N → 5.3 (Medium)

Summary

The EnableShowInService flag on a Service is meant to gate that service's visibility from the public dashboard. The main service-listing endpoint (GET /api/v1/service → showService) correctly filters services with EnableShowInService: false via ServiceSentinel.CopyStats() (service/singleton/servicesentinel.go:421-438). However, two adjacent reader endpoints retrieve service objects through code paths that do not honor the same flag:

  • GET /api/v1/server/:id/service (listServerServices) iterates ServiceSentinel.GetSortedList() (which returns every service regardless of visibility) and emits service ID, name, and timing data for any service monitoring the queried server.
  • GET /api/v1/service/:id/history (getServiceHistory) calls ServiceSentinel.Get(serviceID) directly and emits the service name (and aggregated per-server stats for servers the viewer can see).

Both endpoints are mounted on the optionalAuth group, so an unauthenticated visitor can enumerate hidden services as long as they can guess a public server ID (linear scan over a small numeric ID space) or a service ID (likewise). The service owner's intent — "hide this from the public" via EnableShowInService: false — is silently bypassed.

Affected

  • nezha master at HEAD 636f4a99e6c3d8d75f17fdf7ad55d4ee0f73f1c0 (the audit checkout)
  • All recent 2.x releases that share this code path (post the EnableShowInService filter introduction at CopyStats)

Vulnerability details

[A] — single-source-of-truth filter exists at the listing site

service/singleton/servicesentinel.go:421-438:

func (ss *ServiceSentinel) CopyStats() map[uint64]model.ServiceResponseItem {
    var stats map[uint64]*serviceResponseItem
    copier.Copy(&stats, ss.LoadStats())

    sri := make(map[uint64]model.ServiceResponseItem)
    for k, service := range stats {
        if !service.service.EnableShowInService {       // [A] filter here
            delete(stats, k)
            continue
        }
        service.ServiceName = service.service.Name
        sri[k] = service.ServiceResponseItem
    }
    return sri
}

CopyStats() is the only reader that respects EnableShowInService. Get() and GetSortedList() immediately below it return the raw services with no such filter:

func (ss *ServiceSentinel) Get(id uint64) (s *model.Service, ok bool) {
    ss.servicesLock.RLock(); defer ss.servicesLock.RUnlock()
    s, ok = ss.services[id]
    return                                              // [A'] no EnableShowInService check
}

[B] — listServerServices iterates GetSortedList() and emits hidden services

cmd/dashboard/controller/service.go:258-340 (GET /api/v1/server/:id/service):

func listServerServices(c *gin.Context) ([]*model.ServiceInfos, error) {
    // ... server existence + userCanViewServer check ...
    services := singleton.ServiceSentinelShared.GetSortedList()      // [B] all services, no filter

    for _, service := range services {
        if service.Cover == model.ServiceCoverAll {
            if service.SkipServers[serverID] { continue }
        } else {
            if !service.SkipServers[serverID] { continue }
        }
        // ... fetch history ...
        infos := &model.ServiceInfos{
            ServiceID:   service.ID,
            ServerID:    serverID,
            ServiceName: service.Name,                  // [B'] leaked
            ServerName:  server.Name,
            // ... timing data ...
        }
        result = append(result, infos)
    }
    return result, nil…
Record
GHSA-vrmh-5mmx-hjwx
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-200, CWE-285, CWE-863
Updated
2026-11-02
OSVGO-2026-5672 No score

Nezha's private services (`EnableShowInService: false`) are enumerable via per-server endpoints, leaking name and timing data in github.com/nezhahq/nezha

Nezha's private services (EnableShowInService: false) are enumerable via per-server endpoints, leaking name and timing data in github.com/nezhahq/nezha.

NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.

(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)

The additional affected modules and versions are: github.com/nezhahq/nezha from v2.0.0 before v2.0.14.

Record
GO-2026-5672
Updated
2026-11-02
OSVopenSUSE-SU-2026:21483-1 No score

Security update for govulncheck-vulndb

This update for govulncheck-vulndb fixes the following issues:

  • Update to version 0.0.20260723T184607 2026-07-23T18:46:07Z (jsc#PED-11136).

Go CVE Numbering Authority IDs added or updated with aliases:

  • GO-2026-4730 CVE-2026-33022 GHSA-cv4x-93xx-wgfj
  • GO-2026-4761 CVE-2026-33211 GHSA-j5q5-j9gm-2w5c
  • GO-2026-5102 CVE-2026-45021 GHSA-3vcp-chfh-f6r2
  • GO-2026-5272 CVE-2026-40938 GHSA-94jr-7pqp-xhcq
  • GO-2026-5486 CVE-2026-40924 GHSA-m2cx-gpqf-qf74
  • GO-2026-5542 CVE-2026-40090 GHSA-pj97-4p9w-gx3q
  • GO-2026-5630 CVE-2026-25542 GHSA-rmx9-2pp3-xhcr
  • GO-2026-5643 CVE-2026-40923 GHSA-rx35-6rhx-7858
  • GO-2026-5675 CVE-2026-41492 GHSA-vvf7-6rmr-m29q
  • GO-2026-5711 CVE-2026-40161 GHSA-wjxp-xrpv-xpff
  • GO-2026-5746 CVE-2026-41567 GHSA-x86f-5xw2-fm2r
  • GO-2026-5749 CVE-2026-41328 GHSA-x92x-px7w-4gx4
  • GO-2026-5837 CVE-2026-44840 GHSA-q2m9-6jp9-c6mc
  • GO-2026-5929 CVE-2026-44342 GHSA-26v7-h57m-gh9m
  • GO-2026-5930 CVE-2026-33655 GHSA-6qcr-qxgr-m7fv
  • GO-2026-5933 GHSA-3g4q-2f67-2gvh
  • GO-2026-5934 GHSA-59qp-cfj3-rp64
  • GO-2026-5935 GHSA-7856-g3gv-9wq8
  • GO-2026-5936 CVE-2026-53552 GHSA-26rh-24rg-j3vv
  • GO-2026-5937 CVE-2026-53508 GHSA-2jcc-mxv7-p3f9
  • GO-2026-5938 CVE-2026-53553 GHSA-4g5x-hcwm-82jw
  • GO-2026-5939 CVE-2026-10517 GHSA-698x-9w2p-7vvp
  • GO-2026-5940 CVE-2026-53572 GHSA-6w3m-4hhp-775q
  • GO-2026-5941 CVE-2026-53487 GHSA-gvhc-wv3v-7pf8
  • GO-2026-5942 CVE-2026-46600
  • GO-2026-5944 CVE-2026-50197 GHSA-659f-rgp5-w4wf
  • GO-2026-5945 CVE-2026-6815 GHSA-rmxx-v9rj-vpvg
  • GO-2026-5946 CVE-2026-52831 GHSA-v5px-423j-pf7p
  • GO-2026-5947 CVE-2026-53649 GHSA-xqhv-chqm-fhcc
  • GO-2026-5948 CVE-2026-50554 GHSA-588f-fvcv-xhvf
  • GO-2026-5949 CVE-2026-50553 GHSA-rqrh-8wpv-x7hh
  • GO-2026-5950 CVE-2026-53602 GHSA-339v-266x-79xr
  • GO-2026-5951 CVE-2026-10219 GHSA-6jm8-4fhr-5w64
  • GO-2026-5952 CVE-2026-49834 GHSA-9vcr-p3rj-q5q6
  • GO-2026-5953 CVE-2026-9094 GHSA-c9w5-qp6m-m395
  • GO-2026-5956 CVE-2026-55252 GHSA-h5g6-xmh4-hc37
  • GO-2026-5957 CVE-2026-54158 GHSA-5xfx-xj4h-5p7r
  • GO-2026-5958 CVE-2026-54068 GHSA-gcm7-57gf-953c
  • GO-2026-5959 CVE-2026-54072 GHSA-h29v-hj44-q8cv
  • GO-2026-5961 CVE-2026-54069 GHSA-hvr9-72v2-fff3
  • GO-2026-5962 CVE-2026-54088 GHSA-m93h-4hw7-5qcm
  • GO-2026-5963 CVE-2026-54067 GHSA-mvjr-vv3c-w4qv
  • GO-2026-5964 CVE-2026-54066 GHSA-p4m3-mgmm-c664
  • GO-2026-5965 CVE-2026-54070 GHSA-w7cg-whh7-xp28
  • GO-2026-5966 CVE-2026-54089 GHSA-xqp3-jq6g-x3qm
  • GO-2026-5967 CVE-2026-50551 GHSA-56mp-4f3v-fgj2
  • GO-2026-5968 CVE-2026-54174 GHSA-fpg8-7664-jc5q
  • GO-2026-5969 GHSA-g936-7jqj-mwv8
  • GO-2026-5970 CVE-2026-56852
  • GO-2026-5973 CVE-2026-54250 GHSA-jxr7-mqhw-9p98
  • GO-2026-5974 CVE-2026-44300 GHSA-wmj8-9953-vff5
  • GO-2026-5975 CVE-2026-50018 GHSA-42j2-w334-qxw7
  • GO-2026-5976 CVE-2026-50141 GHSA-g7mm-9vx7-jm7h
  • GO-2026-5977 CVE-2026-50013 GHSA-qrh4-p6v4-mrfg
  • GO-2026-5978 CVE-2026-50125 GHSA-qw5r-ppcg-f8rj
  • GO-2026-5979 CVE-2026-50006 GHSA-xrcf-6jh3-ggvx
  • GO-2026-5980 CVE-2026-50158 GHSA-2c7f-fxww-6w6c
  • GO-2026-5981 GHSA-mqxv-9rm6-w8qc
  • GO-2026-5982 GHSA-pqg7-v6wh-3pfp
  • GO-2026-5984 CVE-2026-53604 GHSA-2p2f-px33-4vv5
  • GO-2026-5985 GHSA-7rx3-5wx3-5v76
  • GO-2026-5986 CVE-2026-61699 GHSA-cm26-5974-52h8
  • GO-2026-5987 CVE-2026-55513 GHSA-g4x6-jcvr-9m3g
  • GO-2026-5988 CVE-2026-54628 GHSA-hwrq-8wxh-q4xv
  • GO-2026-5989 CVE-2026-55512 GHSA-m3cx-mwpg-32jg
  • GO-2026-5990 CVE-2026-54629 GHSA-mf78-3rpf-r784
  • GO-2026-5991 CVE-2026-53603 GHSA-q4vm-pq3q-8wgq
  • GO-2026-5992 CVE-2026-61549 GHSA-qf34-295c-26v8
  • GO-2026-5996 CVE-2026-54450 GHSA-pph6-vfjv-vpjw
  • GO-2026-5997 CVE-2026-54452 GHSA-xgch-x3mx-cm3c
  • GO-2026-5998 CVE-2026-54495 GHSA-398h-7f66-3h4p
  • GO-2026-5999 CVE-2026-10814 GHSA-jh6h-v6mp-h22v
  • GO-2026-6002 CVE-2026-58196 GHSA-pr64-jmmf-jp54
  • GO-2026-6003 CVE-2026-53714 GHSA-22xc-xg2r-9j7v
  • GO-2026-6004 CVE-2026-52833 GHSA-3v79-m2cg-89ww
  • GO-2026-6005 CVE-2026-53715 GHSA-8fv2-88gg-hm7q
  • GO-2026-6006 CVE-2026-53716 GHSA-cxpq-8v7q-cg56 *…
Record
openSUSE-SU-2026:21483-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/nezhahq/nezha
Go
 2.0.0 up to 2.0.14
2.0.14
github.com/nezhahq/nezha
Go
 All versions None known
govulncheck-vulndb
openSUSE:Leap 16.0
From an advisory covering 1734 CVEs
 before 0.0.20260723T184607-160000.1.1
0.0.20260723T184607-160000.1.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-49397 is a medium vulnerability (CVSS 5.3) in Nezhahq Nezha, published June 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 23rd percentile. Fixed in github.com/nezhahq/nezha 2.0.14.

References

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