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CVE-2026-27690 is an HTTP request smuggling vulnerability in SAP Approuter Node.js packages earlier than version 20.10.0, affecting deployments outside Cloud Foundry. Inconsistent interpretation of crafted HTTP request framing can produce request-response desynchronization between HTTP-processing components. An unauthenticated remote attacker can exploit the condition by sending a specially crafted HTTP request.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
32 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical HTTP request smuggling vulnerability in SAP Approuter's Node.js package that could let an unauthenticated remote attacker trigger request-response desynchronization, expose user responses, and cause service unavailability.
Critical HTTP Request Smuggling vulnerability in SAP Approuter caused by inconsistent HTTP request interpretation, enabling an unauthenticated remote attacker to cause denial of service or access user responses.
A critical vulnerability in SAP Approuter.
A critical HTTP request/response smuggling vulnerability in SAP Approuter deployments in non-Cloud Foundry environments that can cause request-response desynchronization, expose user responses, and enable denial-of-service attacks.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.