High severity7.5GHSA Advisory· Published Apr 14, 2026· Updated May 7, 2026
CVE-2026-26171
CVE-2026-26171
Description
Uncontrolled resource consumption in .NET allows an unauthorized attacker to deny service over a network.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
System.Security.Cryptography.XmlNuGet | >= 10.0.0, < 10.0.6 | 10.0.6 |
System.Security.Cryptography.XmlNuGet | >= 9.0.0, < 9.0.15 | 9.0.15 |
System.Security.Cryptography.XmlNuGet | >= 8.0.0, < 8.0.3 | 8.0.3 |
Affected products
3Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
5- github.com/advisories/GHSA-w3x6-4m5h-cxqfghsaADVISORY
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26171nvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-26171ghsaADVISORY
- github.com/dotnet/announcements/issues/389ghsaWEB
- github.com/dotnet/runtime/security/advisories/GHSA-w3x6-4m5h-cxqfghsaWEB
News mentions
50- In Other News: Big Tech vs Canada Encryption Bill, Cisco’s Free AI Security Spec, Audi App FlawsSecurityWeek · May 15, 2026
- Four OpenClaw Flaws Enable Data Theft, Privilege Escalation, and PersistenceThe Hacker News · May 15, 2026
- Living Off the Pipeline: Defending Against CI/CD SubversionSentinelOne Labs · May 15, 2026
- Akamai to acquire LayerX for $205 millionHelp Net Security · May 15, 2026
- What 45 Days of Watching Your Own Tools Will Tell You About Your Real Attack SurfaceThe Hacker News · May 15, 2026
- Keycard helps developers secure autonomous AI agents with scoped accessHelp Net Security · May 15, 2026
- The time of much patching is comingCisco Talos Intelligence · May 14, 2026
- Stealer Backdoor Found in 3 Node-IPC Versions Targeting Developer SecretsThe Hacker News · May 14, 2026
- ThreatsDay Bulletin: PAN-OS RCE, Mythos cURL Bug, AI Tokenizer Attacks, and 10+ StoriesThe Hacker News · May 14, 2026
- KongTuke hackers now use Microsoft Teams for corporate breachesBleepingComputer · May 14, 2026
- Microsoft’s WinUI agent plugin trims token use by over 70% during developmentHelp Net Security · May 14, 2026
- FrostyNeighbor: Fresh mischief and digital shenanigansESET WeLiveSecurity · May 14, 2026
- Iranian hackers targeted major South Korean electronics makerBleepingComputer · May 13, 2026
- Sweet Security Launches Agentic AI Red Teaming to Counter ‘Mythos Moment’SecurityWeek · May 13, 2026
- When IT Support Calls: Dissecting a ModeloRAT Campaign from Teams to Domain CompromiseRapid7 Blog · May 13, 2026
- Fedora Hummingbird brings the container security model to a Linux host OSHelp Net Security · May 12, 2026
- SAP unveils Autonomous Enterprise for AI-driven business operationsHelp Net Security · May 12, 2026
- New TrickMo Variant Uses TON C2 and SOCKS5 to Create Android Network PivotsThe Hacker News · May 12, 2026
- Mini Shai-Hulud Worm Compromises TanStack, Mistral AI, Guardrails AI & More PackagesThe Hacker News · May 12, 2026
- TanStack, Mistral AI, UiPath Hit in Fresh Supply Chain AttackSecurityWeek · May 12, 2026
- State-sponsored actors, better known as the friends you don’t wantCisco Talos Intelligence · May 12, 2026
- Cookie thieves caught stealing dev secrets via fake Claude Code installersThe Register Security · May 11, 2026
- Hackers Used AI to Develop First Known Zero-Day 2FA Bypass for Mass ExploitationThe Hacker News · May 11, 2026
- Build Application Firewalls Aim to Stop the Next Supply Chain AttackSecurityWeek · May 11, 2026
- Linux developers weigh emergency “killswitch” for vulnerable kernel functionsHelp Net Security · May 11, 2026
- Final Countdown: Last Chance to Join the Rapid7 Global Cybersecurity SummitRapid7 Blog · May 11, 2026
- ⚡ Weekly Recap: Linux Rootkit, macOS Crypto Stealer, WebSocket Skimmers and MoreThe Hacker News · May 11, 2026
- Cyber Espionage Group Targets Aviation Firms to Steal Map DataDark Reading · May 11, 2026
- TrickMo Android banker adopts TON blockchain for covert commsBleepingComputer · May 11, 2026
- Fake OpenAI Privacy Filter Repo Hits #1 on Hugging Face, Draws 244K DownloadsThe Hacker News · May 11, 2026
- A week in security (May 4 – May 10)Malwarebytes Labs · May 11, 2026
- Rustinel: Open-source endpoint detection for Windows and LinuxHelp Net Security · May 11, 2026
- Week in review: cPanel vulnerability actively exploited, DigiCert breach, LinkedIn job scamsHelp Net Security · May 10, 2026
- Fake OpenAI repository on Hugging Face pushes infostealer malwareBleepingComputer · May 9, 2026
- Zero Chaos: Scaling Detection Engineering at the Speed of Software, with Detection As CodeRapid7 Blog · May 8, 2026
- Snyk integrates Claude to advance AI-native application securityHelp Net Security · May 8, 2026
- Australia warns of ClickFix attacks pushing Vidar Stealer malwareBleepingComputer · May 7, 2026
- Why Security in 2026 Requires Continuous Threat and Exposure Management (CTEM) at ScaleRapid7 Blog · May 7, 2026
- How Cloudflare responded to the “Copy Fail” Linux vulnerabilityCloudflare Blog · May 7, 2026
- ThreatsDay Bulletin: Edge Plaintext Passwords, ICS 0-Days, Patch-or-Die Alerts and 25+ New StoriesThe Hacker News · May 7, 2026
- Open-source MCP server monitoring for Python appsHelp Net Security · May 7, 2026
- Sysdig delivers cloud security that runs inside AI coding agentsHelp Net Security · May 6, 2026
- MuddyWater hackers use Chaos ransomware as a decoy in attacksBleepingComputer · May 6, 2026
- Muddying the Tracks: The State-Sponsored Shadow Behind Chaos RansomwareRapid7 Blog · May 6, 2026
- MuddyWater Uses Microsoft Teams to Steal Credentials in False Flag Ransomware AttackThe Hacker News · May 6, 2026
- Attackers adopt JavaScript runtime Bun to spread NWHStealerMalwarebytes Labs · May 6, 2026
- Your AI Agents Are Already Inside the Perimeter. Do You Know What They're Doing?The Hacker News · May 6, 2026
- Windows Phone Link Exploited by CloudZ RAT to Steal Credentials and OTPsThe Hacker News · May 6, 2026
- ServiceNow clears agents for landing with new AI control towerThe Register Security · May 5, 2026
- Critical Apache HTTP/2 Flaw (CVE-2026-23918) Enables DoS and Potential RCEThe Hacker News · May 5, 2026