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CVE-2026-57825 is a directory traversal vulnerability in OPAM, the package manager for OCaml. The flaw arises from insufficient restriction of directives in .install files during package installation. OPAM did not properly validate symlink resolution on the target path when installing files, allowing crafted package metadata to cause writes outside the intended package area. By leveraging symlink-based path traversal, a malicious package could escape the package installation boundary and place files in unintended filesystem locations.
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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.
1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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.