CVE-2026-55374 affects Packagist/jleehr/canto-saas-api. The library constructs authenticated API request URLs using path variable values that are inserted without proper URL encoding. Because path segments are not encoded before being incorporated into the request path, an attacker who can control a path variable can manipulate the resulting URL path and cause the client to send an authenticated request to a different endpoint on the same Canto instance than the developer intended. The issue is remediated in version 3.0.0 and later by encoding path segments with rawurlencode() before inserting them into the request URL.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
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.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
No public activity tracked yet. Mallory keeps watching.
No public activity observed for this vulnerability.
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.