CVE-2025-47287: debian debian_linux
Vulnerability summary
CVE-2025-47287 is a high (CVSS 7.5) vulnerability in debian debian_linux. EPSS estimates a 0.74% chance of exploitation in the next 30 days, higher than 53.9% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 17 · Related 20Timeline
- 15-05-2025PublishedVulnerability first disclosed.
- 29-05-2025Last modifiedVulnerability information updated.
Description
Tornado is a Python web framework and asynchronous networking library. 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. All versions of Tornado prior to 6.5.0 are affected. The vulnerable parser is enabled by default. Upgrade to Tornado version 6.50 to receive a patch. As a workaround, risk can be mitigated by blocking `Content-Type: multipart/form-data` in a proxy.
CVSS metrics
8 scores · 8 sources · 1 version- OSV · PypiEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · Red hatEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · WolfiEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · ChainguardEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.74%
Chance of exploitation in the next 30 days
Percentile
54%
Versus all other CVEs
30-day change
0.00 pp
From 0.74% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Suse32 products
- python-tornado6&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS< 6.3.2-150400.9.9.1
- python-tornado6&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS< 6.3.2-150400.9.9.1
- python-tornado6&distro=SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS< 6.3.2-150400.9.9.1
- python-tornado6&distro=SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS< 6.3.2-150400.9.9.1
- python-tornado6&distro=SUSE Linux Enterprise Module for Python 3 15 SP6< 6.3.2-150400.9.9.1
Chainguard12 products
- airflow< 2.10.5-r44
- airflow-3< 3.0.1-r1
- airflow-3-bitnami-compat< 3.0.1-r1
- airflow-3-compat< 3.0.1-r1
- airflow-3-iamguarded-compat< 3.0.1-r1
Wolfi11 products
- airflow< 2.10.5-r44
- airflow-3< 3.0.1-r1
- airflow-3-bitnami-compat< 3.0.1-r1
- airflow-3-compat< 3.0.1-r1
- airflow-3-iamguarded-compat< 3.0.1-r1
Redhat6 products
- python-tornado< 0:6.4.2-1.el10_0.1 | < 0:6.4.2-2.el9_6.2 | < 0:6.4.2-1.el9_4.1 | < 0:6.4.2-1.el9_2.1 | < 0:4.2.1-5.el7_9.1
- python-tornado-debuginfo< 0:4.2.1-5.el7_9.1
- python-tornado-debugsource< 0:6.4.2-1.el10_0.1 | < 0:6.4.2-2.el9_6.2 | < 0:6.4.2-1.el9_4.1 | < 0:6.4.2-1.el9_2.1
- python-tornado-doc< 0:4.2.1-5.el7_9.1
- python3-tornado< 0:6.4.2-1.el10_0.1 | < 0:6.4.2-2.el9_6.2 | < 0:6.4.2-1.el9_4.1 | < 0:6.4.2-1.el9_2.1
Debian2 products
- python-tornado< 6.4.2-2 | < 6.2.0-3+deb12u2 | < 6.1.0-1+deb11u2
- debian_linuxEOL11.0
Opensuse2 products
- python-tornado6&distro=openSUSE Leap 15.6< 6.3.2-150400.9.9.1
- python-tornado6&distro=openSUSE Tumbleweed< 6.5-1.1
Mageia1 product
- python-tornado< 6.3.2-1.2.mga9
PyPI1 product
- tornado< 6.5
Tornadoweb1 product
- tornado< 6.5.0
Ubuntu1 product
- python-tornadoAll versions (No fix recorded) | < 6.4.2-2 | < 6.1.0-3ubuntu0.1~esm2 | < 6.4.0-1ubuntu0.2
10 vendors · 69 products
References
36 links- github.com/tornadoweb/tornado/security/advisories/GHSA-7cx3-6m66-7c5mX Refsource CONFIRMWEBARTICLEREPORTAdvisoryVendor Advisory
- github.com/tornadoweb/tornado/commit/b39b892bf78fe8fea01dd45199aa88307e7162f3X Refsource MISCWEBARTICLEREPORTFIXPatch
Show all 36 references
- pypi.org/project/tornadoPACKAGE
- lists.opensuse.org/archives/…Advisory