{"id":"CVE-2026-62331","published":"2026-10-30T19:18:33.450","lastModified":"2026-10-30T20:17:12.210","description":"praktor is a multi-agent Claude Code orchestrator with Telegram input and output, Docker isolation, and a Mission Control UI. Prior to 0.9.1, both Telegram upload sites in `internal/telegram/bot.go` concatenate the attacker-controlled document filename into a destination path without sanitization, and `path.Join` collapses parent-directory traversal. A remote Telegram user who can message the bot can therefore write outside `uploads/` within the persistent agent workspace mounted at `/workspace/agent`. Because `allow_from: []` permits all senders by default, no prior authentication or privilege is required in that configuration. The attacker can plant or overwrite `CLAUDE.md`, instruction, skill, hook, or configuration files that the Claude agent reads and operates on across later runs, turning a document upload into stored instruction injection. The demonstrated arbitrary-write scope is the persistent agent workspace volume, not an unrestricted host-filesystem write. This issue is fixed in version 0.9.1.","cvssScore":8.2,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","cwes":["CWE-22"],"vendors":[],"products":[],"references":[{"url":"https://github.com/mtzanidakis/praktor/commit/c3731eeda01c0b3ec1dbd13cccd5a147c3182141","tags":[]},{"url":"https://github.com/mtzanidakis/praktor/pull/228","tags":[]},{"url":"https://github.com/mtzanidakis/praktor/releases/tag/v0.9.1","tags":[]},{"url":"https://github.com/mtzanidakis/praktor/security/advisories/GHSA-48v2-6jcm-fc99","tags":[]}],"exploitRefs":[{"url":"https://github.com/mtzanidakis/praktor/commit/c3731eeda01c0b3ec1dbd13cccd5a147c3182141","tags":[]},{"url":"https://github.com/mtzanidakis/praktor/pull/228","tags":[]},{"url":"https://github.com/mtzanidakis/praktor/releases/tag/v0.9.1","tags":[]},{"url":"https://github.com/mtzanidakis/praktor/security/advisories/GHSA-48v2-6jcm-fc99","tags":[]}],"hasPoc":true,"ai":null}