{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-39832/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":9.1,"id":"CVE-2026-39832"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":[],"_cs_severities":["high"],"_cs_tags":["cve-2026-39832","ssh","key forwarding","vulnerability"],"_cs_type":"advisory","_cs_vendors":["Microsoft"],"content_html":"\u003cp\u003eCVE-2026-39832 is a security vulnerability affecting golang.org/x/crypto/ssh/agent. The vulnerability stems from agent constraints being dropped during the forwarding of keys. This can occur in scenarios where an attacker gains control over an intermediary system involved in the SSH key forwarding process. The dropping of these constraints could allow an attacker to bypass intended restrictions and gain unauthorized access to resources protected by the forwarded key. The vulnerability has potential implications for systems relying on SSH key forwarding for secure access control. Defenders should investigate and apply necessary patches or mitigations.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker compromises an intermediary system that is part of an SSH key forwarding chain.\u003c/li\u003e\n\u003cli\u003eVictim initiates an SSH connection to a target system, utilizing key forwarding through the compromised intermediary.\u003c/li\u003e\n\u003cli\u003eThe compromised intermediary intercepts the forwarded key.\u003c/li\u003e\n\u003cli\u003eDue to the vulnerability (CVE-2026-39832) in golang.org/x/crypto/ssh/agent, agent constraints associated with the forwarded key are dropped.\u003c/li\u003e\n\u003cli\u003eThe attacker, now in control of the intermediary, utilizes the forwarded key without the original constraints.\u003c/li\u003e\n\u003cli\u003eThe attacker bypasses intended access restrictions on the target system.\u003c/li\u003e\n\u003cli\u003eAttacker gains unauthorized access to the target system with the privileges of the forwarded key.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-39832 can lead to unauthorized access to systems protected by SSH key forwarding. The dropping of agent constraints allows an attacker to bypass intended restrictions, potentially granting them elevated privileges and access to sensitive data. Depending on the access granted by the forwarded key, the impact could range from data breaches to complete system compromise.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInvestigate patching golang.org/x/crypto/ssh/agent to address CVE-2026-39832 based on vendor advisories.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rules provided below to detect potential exploitation attempts within your environment.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-27T07:18:55Z","date_published":"2026-05-27T07:18:55Z","id":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-39832/","summary":"CVE-2026-39832 describes a vulnerability where agent constraints are dropped when forwarding keys in golang.org/x/crypto/ssh/agent, potentially leading to unauthorized access.","title":"CVE-2026-39832: Agent Constraints Dropped When Forwarding Keys in golang.org/x/crypto/ssh/agent","url":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-39832/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2026-39832","version":"https://jsonfeed.org/version/1.1"}