HOL LogoGuard

Explore HOL

  • HOL home
  • AI agent registry
  • AI plugins
  • Open standards
  • HOL members
  • Sponsor HOL
  • Advertise with HOL

Guard product

  • Guard overviewLocal security and control for AI agents and the tools they use.
  • FeaturesRuntime protection, policy routing, review, and evidence.

Explore Guard

  • Product previewWalk through Guard surfaces in read-only demo mode.
  • ComparisonCompare Guard with native controls and AI security vendors.

AI tools

  • All AI toolsEvery supported AI tool and how Guard applies policy to it.
  • Codex
  • Claude Code
  • Cursor
  • Antigravity CLI
  • OpenCode
  • Hermes
  • OpenClaw
  • GitHub Copilot CLI
  • Antigravity
  • Kimi
  • Grok
  • Pi / Oh My Pi
  • Zcode

Extensions

  • All extensionsBrowse command and MCP coverage with owners and stated limits.
  • Command coverageShell command protection across clouds, databases, backups, and packages.
  • MCP server coverageSee how Guard maps risk state across MCP tools and servers.
  • Core safetyThe safety floor listings that ship with Guard.
  • Data and resilienceBackup and storage command protection.
  • Cloud and infrastructureAWS, Azure, GCP, Kubernetes, and more.

Security

  • AI security hubSecurity research, advisories, and agent safety coverage.
  • AI tool securitySecurity profiles for each supported coding agent.
  • Safe labsHands-on attack simulations with safe boundaries.
  • Redacted warningsReal blocked actions with sensitive details removed.
  • AdvisoriesCoordinated disclosure reports for AI tooling.
  • Active CVEsSearch active CVEs affecting AI tooling.

Learn

  • Security guidesPractical guides for securing AI agent workflows.
  • DocsInstall, configure, and operate Guard with confidence.
  • ResearchPublished security research, benchmarks, and methodology.

Community

  • ReleasesVersion history, shipped changes and upgrade notes.
  • ContributorsThe people and contributions behind HOL Guard.
  • AffiliatesShare Guard with your audience and earn from referrals.
  • SponsorFund agreed research, implementation and shared testing through the HOL Partner Program.
  • AdvertiseCompare README logo placements, previews and monthly prices, or promote a plugin or extension.
PricingEnterpriseOpen AppInstall Guard
  1. Guard
  2. Security
  3. CVEs
  4. CVE 2026 57023 junos os mx with spc3 srx series a specifically
HOL Guard

Public security guidance for teams protecting AI harnesses, MCP servers, skills, prompts, and local tool execution.

Install Guard

AI Security

  • Prompt injection
  • MCP security
  • OWASP MCP mapping
  • Supply chain

Resources

  • Trust packet
  • Harness setup
  • Redacted warnings
  • Safe labs

Product

  • Install Guard
  • Pricing
  • Open dashboard
Guard
  • Guard Overview
  • Releases
  • Contributors
  • Install Guard
  • Pricing
Docs
  • Documentation Index
  • Developer Hub
  • API Reference
  • Root OpenAPI
  • Registry OpenAPI
  • Run in Postman
  • Standards
  • Submit ERC-8004 Contract
  • Feature Your Agent
Best Plugins
  • Browse Plugins
  • Plugin Launches
  • Best Claude Plugins
  • Best Codex Plugins
  • Best Grok Plugins
  • Best Kimi Plugins
  • Best DeepSeek Plugins
  • Best Antigravity Plugins
  • Best MCP Servers
  • Best Cursor Plugins
  • Best OpenCode Plugins
Best Agents
  • Best ERC-8004 Agents
  • Best Virtuals Agents
  • Best MCP Servers
  • Best A2A Agents
  • Best x402 Payable
  • All Categories
Community
  • Contribute to HOL
  • Telegram
  • X
More
  • About HOL
  • Sponsor
  • Advertise
  • Affiliate program
  • Contact
  • Blog
  • GitHub
  • Privacy
  • Terms of Service
Settings

Copyright © 2026 HOL DAO LLC. All rights reserved.

Back to active CVEs
High · CVSS 8.7CVE-2026-57023

Junos OS: MX with SPC3, SRX Series: A specifically malformed TCP packet causes a flowd crashCVE-2026-57023

Answer in brief

CVE-2026-57023 records a High severity (CVSS 8.7) vulnerability in Junos OS: MX with SPC3, SRX Series: A specifically malformed TCP packet causes a flowd crash. The current sources do not mark it as known exploited. The current feed maps Juniper Networks/Junos OS (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 9, 2026Updated Oct 25, 2026Source checked Nov 5, 2026First seen by HOL Jul 10, 2026Material review Oct 25, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.7
Exploitation
Not marked as known exploited
Affected software
54 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Juniper Networks/Junos OS (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:h:juniper:mx240:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:mx480:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:mx960:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:mx-spc3:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx1500:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx1600:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx2300:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx300:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx320:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx340:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx345:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx380:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx400:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx4100:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx4120:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx4200:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx4300:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx440:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx4600:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx4700:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx5400:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx5600:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:h:juniper:srx5800:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:23.4:-:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:23.4:r1:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:23.4:r1-s1:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:23.4:r1-s2:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:23.4:r2:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:23.4:r2-s1:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:23.4:r2-s2:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:23.4:r2-s3:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:23.4:r2-s4:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:23.4:r2-s5:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:23.4:r2-s6:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:24.2:-:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:24.2:r1:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:24.2:r1-s1:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:24.2:r1-s2:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:24.2:r2:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:24.2:r2-s1:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:24.2:r2-s2:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:24.2:r2-s3:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:24.4:-:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:24.4:r1:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:24.4:r1-s2:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:24.4:r1-s3:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:24.4:r2:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:24.4:r2-s1:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:24.4:r2-s2:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:25.2:-:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:25.2:r1:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:25.2:r1-s1:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:juniper:junos:25.2:r1-s2:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Juniper Networks/Junos OSgeneric>=23.4 <23.4R2-S7 || >=24.2 <24.2R2-S4 || >=24.4 <24.4R2-S3 || >=25.2 <25.2R223.4R2-S7, 24.2R2-S4, 24.4R2-S3, 25.2R2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Juniper Networks/Junos OS.
  2. 2Review the reported fix. Source-reported solution: The following software releases have been updated to resolve this specific issue: 23.4R2-S7, 24.2R2-S4, 24.4R2-S3, 25.2R2, 25.4R1, and all subsequent releases.

Evidence timeline and material changes

  1. Published upstream

    Jul 9, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 25, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Jul 10, 2026

Sources and claim methodology

  • Source referencesupportportal.juniper.net
Upstream source description

An Improper Validation of Specified Quantity in Input vulnerability in the TCP proxy plugin of Juniper Networks Junos OS on MX Series with SPC3, and SRX Series allows an unauthenticated, network-based attacker to cause a complete Denial of Service (DoS). When TCP proxy is engaged in a flow session, to support ALGs, Advanced Anti-Malware, ICAP or UTM, a TCP packet with specifically malformed TCP header will cause flow processing daemon (flowd) to crash and restart. This causes a complete service outage until the system has automatically recovered. This issue affects Junos OS on MX with SPC3, and SRX Series:  * 23.4 versions before 23.4R2-S7,  * 24.2 versions before 24.2R2-S4,  * 24.4 versions before 24.4R2-S3, * 25.2 versions before 25.2R2. This issue does not affect releases before 23.4R1.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-1284
Source
CVE List V5
Source checked
Nov 5, 2026
References
1 linked source
Open source record