The chart below shows the most common weaknesses found in vulnerabilities across the Erlang ecosystem. Understanding which weakness types recur most often helps library authors and application developers focus their security efforts where they matter most.

Each CVE is mapped to its CWE (Common Weakness Enumeration) using the MITRE CWE hierarchy. A slice's count includes every CVE reachable anywhere below it in the hierarchy, not just CVEs assigned that exact CWE — click a slice or legend row to drill into its direct children and see the same breakdown one level down.

Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') CWE-113 CWE-113 at MITRE

The product receives data from an HTTP agent/component (e.g., web server, proxy, browser, etc.), but it does not neutralize or incorrectly neutralizes CR and LF characters before the data is included in outgoing HTTP headers.

CVEs

CVEs for Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') CWE-113

Summary Publication CVE ID Published
HTTP Response Splitting via Non-VCHAR Bytes in cow_http_struct_hd:escape_string/2 CVE-2026-43966 2026-06-08
CRLF injection in Tesla.Multipart.add_content_type_param/2 allows HTTP header injection CVE-2026-48596 2026-06-02
2 CVEs