What’s Vulnerable › Vulnerabilities

CVE-2026-108759: mistral.rs 0.9.0 through 0.9.4 Sandbox Escape via Symlink Following in mistralrs-code-exec

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-11 · updated 2026-10-18
• Weakness: CWE-59

Description

mistral.rs 0.9.0 through 0.9.4 contains a link following vulnerability in mistralrs-code-exec that allows sandboxed shell code to read and overwrite files outside the sandbox via symlinks. Attackers or prompt-injected agents can name symlinks as outputs or reuse sessions with symlinked input paths to access files with the server process's permissions.

Affected products

• EricLBuehler Mistral.rs: from 0.9.0 through 0.9.4

References

• https://github.com/EricLBuehler/mistral.rs
• https://github.com/EricLBuehler/mistral.rs/blob/4400935451da5e2dc7379a3f92fbbada66557f6c/mistralrs-code-exec/src/files.rs#L241-L254
• https://github.com/EricLBuehler/mistral.rs/blob/4400935451da5e2dc7379a3f92fbbada66557f6c/mistralrs-code-exec/src/mount.rs#L30-L50
• https://hackmd.io/@haind03/ericlbuehler-mistralrs-code-exec-output-symlink-sandbox-escape
• https://www.vulncheck.com/advisories/mistral-rs-0.9.0-through-0.9.4-sandbox-escape-via-symlink-following-in-mistralrs-code-exec

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