Kuberwastaken/claurst · error

Path contains URL-encoded traversal sequences

Error message

Path contains URL-encoded traversal sequences: {:?}

What it means

Path-security guard in validate_memory_path: the path (case-insensitively) contains %2e or %2f — percent-encoded '.' or '/' sequences used to smuggle traversal past naive decoding. The formatted value is the offending input; the check runs before any decoding so encoded traversal cannot escape the memory directory.

Solutions

1. Rename the file so its key contains no percent-encoded dot/slash sequences
2. Reject the entry — encoded traversal in a sync key is hostile or corrupted input
3. Sanitize team-memory keys on ingest before they reach sync

When it happens

Trigger: Thrown at src-rust/crates/core/src/team_memory_sync.rs:88 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Kuberwastaken/claurst@b0637c97ec (2026-09-10). Data as JSON: /api/errors/75f7360d45190837. Report an issue: GitHub.

Appendix: source

Thrown at src-rust/crates/core/src/team_memory_sync.rs:88

// ---------------------------------------------------------------------------
// Path security validation
// ---------------------------------------------------------------------------

/// Reject paths that could escape the team-memory directory.
///
/// Checks performed (mirroring the TypeScript `securePath` validation):
/// - No null bytes
/// - No URL-encoded traversal sequences (`%2e`, `%2f`, case-insensitive)
/// - No backslashes
/// - Not an absolute path (Unix `/` or Windows `C:` style)
/// - No `..` components
pub fn validate_memory_path(path: &str) -> Result<()> {
    if path.contains('\0') {
        anyhow::bail!("Path contains null bytes: {:?}", path);
    }
    let lower = path.to_ascii_lowercase();
    if lower.contains("%2e") || lower.contains("%2f") {
        anyhow::bail!("Path contains URL-encoded traversal sequences: {:?}", path);
    }
    if path.contains('\\') {
        anyhow::bail!("Path contains backslashes: {:?}", path);
    }
    if path.starts_with('/') {
        anyhow::bail!("Absolute Unix paths not allowed: {:?}", path);
    }
    // Windows-style absolute path: e.g. "C:" or "c:"
    if path.len() >= 2 {
        let mut chars = path.chars();
        let first = chars.next().unwrap();
        if first.is_ascii_alphabetic() && chars.next() == Some(':') {
            anyhow::bail!("Absolute Windows paths not allowed: {:?}", path);
        }
    }
    if path.split('/').any(|component| component == "..") {
        anyhow::bail!("Path traversal not allowed: {:?}", path);
    }

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