| Name | CVE-2026-123534 |
| Description | Tornado before 6.6 contains a path traversal vulnerability in RequestHandler.static_url() and get_version() that allows attackers to hash files outside static_path using ../ sequences. Attackers controlling input passed to static_url() can obtain SHA-512 hashes of readable files to confirm their existence, or reference /dev/zero to block the event loop indefinitely. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| python-tornado (PTS) | bookworm, bookworm (security) | 6.2.0-3+deb12u4 | vulnerable |
| trixie (security), trixie | 6.4.2-3+deb13u2 | vulnerable | |
| forky | 6.5.5-5 | vulnerable | |
| sid | 6.6.0-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| python-tornado | source | (unstable) | 6.6.0-1 |
https://github.com/tornadoweb/tornado/security/advisories/GHSA-v8g8-cp5j-42fg
https://github.com/tornadoweb/tornado/pull/3784
Fixed by: https://github.com/tornadoweb/tornado/commit/6371c4b67a19766b86d0eb7c7b0c913fc37722fe (v6.6.0rc1)
Fixed by: https://github.com/tornadoweb/tornado/commit/2b230bf89604fa7cfaf7e1d0922aeb2ed919f3a4 (v6.6.0rc1)
Fixed by: https://github.com/tornadoweb/tornado/commit/c433feb3b2bca6f69f9b30e98af6a66069f1edd4 (v6.6.0rc1)