Security context

What an agent needs to avoid regressing past fixes and find the next vuln in this repo.

tecnickcom/tcpdf

              main @ 8d19d26
            

Fixes

CVEs

CRITICAL

Peak severity

Highlights

Path Traversal: 7 prior fixes. Scrutinize any change in this area.

tcpdf.php: most-fixed (16 issues). Treat as high-risk during review.

8 high-severity fixes in this history; regressions here are high-impact.

Recurring patterns

The bug types that recur here, drawn from past fixes, not open vulnerabilities.

Path Traversal: Attackers can exploit unresolved relative paths or URL-encoded traversal sequences in HTML image sources, SVG font attributes, and file stream paths to read arbitrary local files or trigger unlinks outside allowed directories.

Deserialization of Untrusted Data: Processing untrusted input using PHP protocols (such as phar://) triggers automatic deserialization of metadata, facilitating remote code execution via POP chains.

Remote Code Execution: Allowing arbitrary methods to be executed via HTML tags (<tcpdf>) allows attackers to hijack control flow using call_user_func_array unless explicitly restricted by allowed method lists and signature verification.