CVE-2026-123558
📛 CVE Title
Zebra before 7.0.0 Checkpoint Sync Denial of Service via Cancelled Verifier Rewind
Description
Zebra zebrad before 7.0.0 contains a denial of service vulnerability that allows a malicious peer to stall checkpoint sync by cancelling the verifier rewind after a failed commit. Attackers can serve a forged block with altered authorizing data plus a restart-triggering block, leaving the verifier rejecting honest blocks until restart.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- VulnCheck
- CVSS severity
- HIGH
- CVSS score
- 8.7 / 10
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N- Effective score
- 8.7 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-460 - Reserved
- 2026-11-06
- Published
- 2026-11-08 01:37 UTC
- Last updated
- 2026-11-08 01:37 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/123xxx/CVE-2026-123558.json
- Linked Threat
- CVE-2026-123558 — Zebra before 7.0.0 Checkpoint Sync Denial of Service via Cancelled Verifier Rewind
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-119443
EUVD enrichment is queued; refresh the page in a few seconds.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| ZcashFoundation | zebra |
0 (affected),
7.0.0 (unaffected)
|
— |
Vendor references (2)
References embedded in the original CVE record by the assigning CNA.
- GitHub Security Advisory (GHSA-2w9f-9wx8-f5c8) vendor-advisory
- VulnCheck Advisory: Zebra before 7.0.0 Checkpoint Sync Denial of Service via Cancelled Verifier Rewind third-party-advisory
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
Remediations (10)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:app.opencve.io
IBM Verify Identity Access can allow a remote attacker to cause a denial of service when it processes incoming request resources without properly validating them. The flaw enables resource consumption beyond normal limits, potentially exhausting memory or CPU, and interrupting service availability. This weakness is classified as CWE-674, improper resource allocation.
2026-11-08 10:24 UTC -
web:cvedatabase.com
Search and analyze CVE vulnerabilities with instant access to CVSS scores, affected products, and remediation guidance.
2026-11-08 10:24 UTC -
web:cybersecuritynews.com
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has issued Binding Operational Directive (BOD) 26-04, titled "Prioritizing Security Updates Based on Risk," compelling all Federal Civilian Executive Branch (FCEB) agencies to remediate the most dangerous known exploited vulnerabilities within just three calendar days.
2026-11-08 10:24 UTC -
web:cycode.com
Learn about sshole ( CVE - 2026 -123158), an OpenSSH authentication bypass vulnerability affecting Alpine Linux, key exposure criteria, affected public images, and fix guidance.
2026-11-08 10:24 UTC -
web:sec.cloudapps.cisco.com
As part of Cisco's ongoing commitment to proactive security and product quality, engineering teams conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. These vulnerabilities were found during internal testing and are not known to be actively exploited. To assist customers in patching ...
2026-11-08 10:24 UTC -
web:senserva.com
Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.
2026-11-08 10:24 UTC -
web:support.citrix.com
What Customers Should Do CVE 2026 -3055 was identified internally through our ongoing security reviews and broader efforts to strengthen the security of the product. Cloud Software Group strongly urges affected customers of NetScaler ADC and NetScaler Gateway to install the relevant updated versions as soon as possible. NetScaler ADC and NetScaler Gateway 14.1-60.58 NetScaler ADC and NetScaler ...
2026-11-08 10:24 UTC -
web:www.ionix.io
Sample Spark prompt: Take a look at CVE - 2026 -123158 in the IONIX threat center. Then fetch all " Fix Network issue: SSH weak authentication method" action items and for each of them check the identified technologies. Give me a short list of assets that are most likely effected (e.g. based on the OpenSSH versions they expose). What to do Patch first.
2026-11-08 10:24 UTC -
web:www.oracle.com
This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.
2026-11-08 10:24 UTC -
web:www.oracle.com
Prior Critical Patch Update and Critical Security Patch Update advisories should be reviewed for information regarding earlier published security patches. Refer to Critical Patch Updates, Critical Security Patch Updates, Security Alerts and Bulletins for information about Oracle Security advisories.
2026-11-08 10:24 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-123558.json.
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageURL": "pkg:cargo/zebrad",
"product": "zebra",
"vendor": "ZcashFoundation",
"versions": [
{
"lessThan": "7.0.0",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "7.0.0",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:zfnd:zebra:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.0.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "SphereDonout"
},
{
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"type": "coordinator",
"value": "mpguerra"
},
{
"lang": "en",
"type": "remediation reviewer",
"value": "conradoplg"
},
{
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],
"datePublic": "2026-10-22T00:00:00.000Z",
"descriptions": [
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}
],
"metrics": [
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"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
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},
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{
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"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
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],
"problemTypes": [
{
"descriptions": [
{
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"description": "Improper Cleanup on Thrown Exception",
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}
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"providerMetadata": {
"dateUpdated": "2026-11-08T01:37:59.650Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "GitHub Security Advisory (GHSA-2w9f-9wx8-f5c8)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-2w9f-9wx8-f5c8"
},
{
"name": "VulnCheck Advisory: Zebra before 7.0.0 Checkpoint Sync Denial of Service via Cancelled Verifier Rewind",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/zebra-before-7.0.0-checkpoint-sync-denial-of-service-via-cancelled-verifier-rewind"
}
],
"title": "Zebra before 7.0.0 Checkpoint Sync Denial of Service via Cancelled Verifier Rewind",
"x_generator": {
"engine": "vulncheck-endgame"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-123558",
"datePublished": "2026-11-08T01:37:59.650Z",
"dateReserved": "2026-11-06T00:50:45.483Z",
"dateUpdated": "2026-11-08T01:37:59.650Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
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}