- Description
- Cursor is a code editor built for programming with AI. Prior to 3.0, Cursor runs agent terminal commands in a sandbox by default. Before a Write, the agent canonicalizes the target path to confirm it stays inside the workspace, but when canonicalization fails it falls back to the original path and writes without approval. A malicious agent can create an in-workspace symlink that points outside the workspace and force canonicalization to fail — either because the target does not exist or because read permission is removed from the path — so the agent writes through the symlink to an arbitrary location without approval. A malicious agent could write arbitrary files outside the workspace under the user's privileges. This enables non-sandboxed Remote Code Execution — for example by overwriting the cursorsandbox helper so later commands run unsandboxed — with no user interaction beyond a benign prompt. This vulnerability is fixed in 3.0.
- Source
- security-advisories@github.com
- NVD status
- Analyzed
- Products
- cursor
CVSS 4.0
- Type
- Secondary
- Base score
- 9.3
- Impact score
- -
- Exploitability score
- -
- Vector string
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity
- CRITICAL
CVSS 3.1
- Type
- Primary
- Base score
- 9.8
- Impact score
- 5.9
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity
- CRITICAL
- security-advisories@github.com
- CWE-59
- Hype score
- Not currently trending
🔐 CVE-2026-50548 & CVE-2026-50549 — Cursor IDE Sandbox Escape RCE 🔗 https://t.co/yWwIuxlbZf #CyberSecurity #ThreatIntel
@ThreatAft
6 Jul 2026
66 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
Two CVSS 9.3 vulns in Cursor AI code editor. Info, incl. fix info, at vulnerability alert service, #SecAlerts: CVE-2026-50549: https://t.co/QLLNCs2Xgf CVE-2026-50548: https://t.co/rRvHpFXJE0 #ciso #cio #cto #vulnerabilities #cybersecurity #msp #mssp #CVE202650548 #CVE202650549
@SecAlertsCo
6 Jul 2026
29 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
The new "DuneSlide" vulnerabilities in Cursor AI (CVE-2026-50548 & CVE-2026-50549) let attackers bypass sandbox protections using indirect prompt injection—zero clicks required. 🛑 See the fix & mitigation guide here 👇 🔗 https://t.co/4pKZJU8h69 #InfoSec #AI #De
@udaypatil077
4 Jul 2026
3 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
Two Cursor flaws let one prompt escape the sandbox. DuneSlide (CVE-2026-50548, CVE-2026-50549): - CVSS 9.8, no click required - Prompt injection runs arbitrary commands on dev machines - Patched, but every Cursor build before the fix is exposed Update today, then audit your
@so_sthbryan
4 Jul 2026
81 Impressions
1 Retweet
1 Like
0 Bookmarks
1 Reply
0 Quotes
🚨 AI dev-tool security watch: Cato reports two critical Cursor IDE flaws, CVE-2026-50548 and CVE-2026-50549, that can turn prompt-injection exposure into sandbox escape and local code-execution risk. Cursor 3.0 includes fixes. #Cybersecurity #AI https://t.co/kFwszdCRyA
@Divinmentis
4 Jul 2026
9 Impressions
0 Retweets
0 Likes
0 Bookmarks
2 Replies
0 Quotes
1/3 Two critical flaws (CVE-2026-50548 and CVE-2026-50549, CVSS 9.8) in Cursor AI let prompt injection escape the sandbox and run commands on the developer's machine. No click needed. All versions before 3.0 are affected. Patch now. #CVE #PromptInjection #cybersecurity
@CyberTLDR
2 Jul 2026
60 Impressions
0 Retweets
0 Likes
0 Bookmarks
1 Reply
0 Quotes
DuneSlide: Two Critical RCE Vulnerabilities CVE-2026-50548 and CVE-2026-50549 via Zero-Click Prompt Injection in Cursor IDE via @CatoNetworks #Proficio #ThreatNews #Cybersecurity #MSSP #MDR https://t.co/HP4qAM5BDo
@proficioinc
2 Jul 2026
93 Impressions
0 Retweets
1 Like
0 Bookmarks
0 Replies
0 Quotes
Critical bugs in Cursor Desktop! 🚨 CVE-2026-50548 and CVE-2026-50549 allow AI agents to escape the sandbox and execute arbitrary code (RCE) on your host. Read the full technical breakdown and protection steps here: https://t.co/2L97WSoFlE #AISecurity #Infosec #CVE https://t
@denizhalilT
2 Jul 2026
45 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
🚨 Critical - Sandbox Escape & RCE in Cursor AI Editor (CVE-2026-50549, CVE-2026-50548) Two critical vulnerabilities have been disclosed in Cursor's AI agent sandbox. Malicious agents can exploit canonicalization failures via symlinks or manipulate the working_directory
@UpwindMDR
6 Jun 2026
60 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
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