build(deps): update dependency tornado to v6.5 [security] (hotfix/8.9)
Metadata
Current evaluation
Merged PR #5495 updated Tornado from 6.4.2 to 6.5 on hotfix/8.9, addressing CVE-2025-47287; all CI checks passed.
Resolution: closed resolved
Reason: PR #5495 was merged as commit 70b9ecae9, upgrading Tornado to 6.5 to fix the multipart parser log-flooding denial-of-service vulnerability. All listed CI and security checks passed.
Evaluated by: mr-cal-bot
No scores available.
Issue body
This PR contains the following updates:
| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [tornado](http://www.tornadoweb.org/) ([source](https://redirect.github.com/tornadoweb/tornado)) | `==6.4.2` -> `==6.5` | [](https://docs.renovatebot.com/merge-confidence/) | [](https://docs.renovatebot.com/merge-confidence/) | [](https://docs.renovatebot.com/merge-confidence/) | [](https://docs.renovatebot.com/merge-confidence/) |
### GitHub Vulnerability Alerts
#### [CVE-2025-47287](https://redirect.github.com/tornadoweb/tornado/security/advisories/GHSA-7cx3-6m66-7c5m)
### Summary
When Tornado's ``multipart/form-data`` parser encounters certain errors, it logs a warning but continues trying to parse the remainder of the data. This allows remote attackers to generate an extremely high volume of logs, constituting a DoS attack. This DoS is compounded by the fact that the logging subsystem is synchronous.
### Affected versions
All versions of Tornado prior to 6.5.0 are affected. The vulnerable parser is enabled by default.
### Solution
Upgrade to Tornado version 6.5. In the meantime, risk can be mitigated by blocking `Content-Type: multipart/form-data` in a proxy.
---
### Release Notes
<details>
<summary>tornadoweb/tornado (tornado)</summary>
### [`v6.5`](https://redirect.github.com/tornadoweb/tornado/compare/v6.4.2...v6.5.0)
[Compare Source](https://redirect.github.com/tornadoweb/tornado/compare/v6.4.2...v6.5.0)
</details>
---
### Configuration
📅 **Schedule**: Branch creation - "" in timezone Etc/UTC, Automerge - At any time (no schedule defined).
🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.
♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.
🔕 **Ignore**: Close this PR and you won't be reminded about this update again.
---
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---
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Evaluation history
| Date | Model | Scores | Action | Summary |
|---|---|---|---|---|
| stealth/space-bunny-alpha | — | closed resolved | Merged PR #5495 updated Tornado from 6.4.2 to 6.5 on hotfix/8.9, addressing CVE-2025-47287; all CI checks passed. | |
| stealth/space-bunny-alpha | — | closed resolved | Renovate PR merged, bumping tornado 6.4.2 -> 6.5 in hotfix/8.9 (commit 70b9ecae9) to fix CVE-2025-47287 multipart log-flooding DoS. All CI checks passed. Same bump landed on main via #5492 (5a70b3055). | |
| stealth/space-bunny-alpha | — | closed resolved | Merged PR #5495 upgraded Tornado 6.4.2 to 6.5 on hotfix/8.9, patching CVE-2025-47287. All CI checks passed; the update was recorded in commit 70b9ecae9. | |
| qwen/qwen3.6-35b-a3b | — | — | Merged dependency update upgrading Tornado from 6.4.2 to 6.5 to resolve CVE-2025-47287, a multipart/form-data logging denial-of-service vulnerability. All CI checks passed and changes were merged into the hotfix/8.9 branch. | |
| qwen3.6-35b-a3b-mtp-q6 | — | — | Merged automated update upgrading Tornado from 6.4.2 to 6.5 on the hotfix/8.9 branch. Resolves CVE-2025-47287, a synchronous logging denial-of-service vulnerability in the multipart/form-data parser. |
Update history
No update history recorded yet.
Related work
-
Related To:
canonical/snapcraft#5492
(confidence 99%)
Parallel merged PR applied the same Tornado 6.5 security update to main in commit 5a70b3055.
Related issues
| Issue | Project | State | Summary | Similarity |
|---|---|---|---|---|
| #5492 build(deps): update dependency tornado to v6.5 [security] (main) | snapcraft | merged | Renovate PR #5492 bumped tornado 6.4.2 -> 6.5 in main (commit 5a70b3055), fixing CVE-2025-47287 multipart log-flooding DoS. Approved by 2 reviewers, all CI checks passed, merged. Companion PR #5495 (70b9ecae9) landed the same bump on hotfix/8.9. | |
| #5494 build(deps): update dependency tornado to v6.5 [security] (hotfix/8.8) | snapcraft | closed | Closed unmerged after integration and OSV-scanner failures; equivalent Tornado 6.5 updates merged in #5492 (5a70b3055) and #5495 (70b9ecae9). | |
| #5493 build(deps): update dependency tornado to v6.5 [security] (hotfix/7.5) - autoclosed | snapcraft | closed | Autoclosed unmerged; the equivalent Tornado 6.5 security fix merged to main via #5492 (5a70b3055), while hotfix/7.5 remained unchanged. | |
| #82 build(deps): update tornado to 6.4.2 | craft-platforms | merged | Merged Tornado 6.4.2 update in #82 (commit f297bac), addressing CVE GHSA-8w49-h785-mj3c. | |
| #5153 build(deps): update dependency tornado to v6.4.2 [security] (hotfix/7.5) - autoclosed | snapcraft | closed | Renovate autoclosed the unmerged Tornado 6.4.2 security update for hotfix/7.5; no reviews or CI runs occurred. | |
| #5154 build(deps): update dependency tornado to v6.4.2 [security] (hotfix/8.4) | snapcraft | closed | Tornado 6.4.2 hotfix for 8.4 was closed unmerged because the imminent 8.5.0 release would replace the 8.4.x branch. | |
| #5152 build(deps): update dependency tornado to v6.4.2 [security] (main) - autoclosed | snapcraft | closed | Autoclosed unmerged as redundant: #5151 independently merged the same Tornado 6.4.2 security upgrade in commit 25f4e2c9a. | |
| #4847 chore(deps): update dependency tornado to v6.4.1 [security] | snapcraft | merged | Merged #4847 in commit 6aa369677, upgrading Tornado from 6.3.3 to 6.4.1 to address GHSA-753j-mpmx-qq6g and GHSA-w235-7p84-xx57. | |
| #4846 build(deps): bump tornado from 6.3.3 to 6.4.1 in /docs/.sphinx | snapcraft | closed | Closed as redundant after PR #4847 (commit 6aa369677) updated Tornado to 6.4.1; Dependabot noted the dependency was already current. | |
| #5151 build(deps): bump tornado from 6.4.1 to 6.4.2 in /docs/.sphinx | snapcraft | merged | Merged #5151 via commit 25f4e2c9a, updating Tornado from 6.4.1 to 6.4.2 in the documentation Sphinx requirements. |