Vulnerability-Lookup

SUSE-SU-2026:22445-1

Vulnerability from csaf_suse - Published: 2026-06-26 09:55 - Updated: 2026-09-16 20:01

Summary

Security update for python-tornado6

Severity

Important

Notes

Title of the patch: Security update for python-tornado6

Description of the patch: This update for python-tornado6 fixes the following issues - CVE-2026-49853: authorization header forwarded across cross-origin redirects in SimpleAsyncHTTPClient (bsc#1268395). - CVE-2026-49854: out-of-bounds memory access via C extension (bsc#1268396). - CVE-2026-49855: AsyncHTTPClient accumulates decompressed chunks without size limit (bsc#1268397).

Patchnames: SUSE-SLE-Micro-6.1-593

CVE-2026-49853

7.4 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Micro 6.1:python311-tornado6-6.4-slfo.1.1_5.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:python311-tornado6-6.4-slfo.1.1_5.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:python311-tornado6-6.4-slfo.1.1_5.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:python311-tornado6-6.4-slfo.1.1_5.1.x86_64	—	Vendor Fix

Threats

Impact important

CVE-2026-49854

3.7 (Low)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

Recommended 4 products, the same list as for CVE-2026-49853

Threats

Impact low

CVE-2026-49855

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Recommended 4 products, the same list as for CVE-2026-49853

Threats

Impact important

References

20 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://lists.suse.com/pipermail/sle-security-upd…	self
https://bugzilla.suse.com/1268395	self
https://bugzilla.suse.com/1268396	self
https://bugzilla.suse.com/1268397	self
https://www.suse.com/security/cve/CVE-2026-49853/	self
https://www.suse.com/security/cve/CVE-2026-49854/	self
https://www.suse.com/security/cve/CVE-2026-49855/	self
https://www.suse.com/security/cve/CVE-2026-49853	external
https://bugzilla.suse.com/1268395	external
https://bugzilla.suse.com/1268456	external
https://bugzilla.suse.com/1275467	external
https://www.suse.com/security/cve/CVE-2026-49854	external
https://bugzilla.suse.com/1268396	external
https://bugzilla.suse.com/1268458	external
https://www.suse.com/security/cve/CVE-2026-49855	external
https://bugzilla.suse.com/1268397	external
https://bugzilla.suse.com/1275467	external

JSON

To clipboard

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            "SUSE Linux Micro 6.1:python311-tornado6-6.4-slfo.1.1_5.1.ppc64le",
            "SUSE Linux Micro 6.1:python311-tornado6-6.4-slfo.1.1_5.1.s390x",
            "SUSE Linux Micro 6.1:python311-tornado6-6.4-slfo.1.1_5.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.1:python311-tornado6-6.4-slfo.1.1_5.1.aarch64",
            "SUSE Linux Micro 6.1:python311-tornado6-6.4-slfo.1.1_5.1.ppc64le",
            "SUSE Linux Micro 6.1:python311-tornado6-6.4-slfo.1.1_5.1.s390x",
            "SUSE Linux Micro 6.1:python311-tornado6-6.4-slfo.1.1_5.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-06-26T09:55:28Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-49855"
    }
  ]
}

CVE-2026-49853 (GCVE-0-2026-49853)

Vulnerability from cvelistv5 – Published: 2026-07-14 20:41 – Updated: 2026-07-21 14:47

Title

Tornado: Authorization header forwarded across cross-origin redirects in SimpleAsyncHTTPClient

Summary

Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, SimpleAsyncHTTPClient shallow-copied redirected requests and removed only the Host header, leaving Authorization, auth_username, auth_password, and auth_mode in place when a redirect changed scheme, host, or port. This issue is fixed in version 6.5.6.

Severity

7.7 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-21 14:47 UTC

CWE

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/tornadoweb/tornado/security/ad…	x_refsource_CONFIRM
https://github.com/tornadoweb/tornado/pull/3626	x_refsource_MISC
https://github.com/tornadoweb/tornado/commit/aba2…	x_refsource_MISC
https://github.com/tornadoweb/tornado/releases/ta…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
tornadoweb	tornado	Affected: < 6.5.6

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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        "metrics": [
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        }
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            "attackComplexity": "LOW",
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          ],
          "url": "https://github.com/tornadoweb/tornado/security/advisories/GHSA-3x9g-8vmp-wqvf"
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          "name": "https://github.com/tornadoweb/tornado/pull/3626",
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          "url": "https://github.com/tornadoweb/tornado/pull/3626"
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-49854 (GCVE-0-2026-49854)

Vulnerability from cvelistv5 – Published: 2026-07-14 20:43 – Updated: 2026-07-15 13:26

Title

Tornado: Out-of-bounds memory access in C extension

Summary

Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, the optional native extension tornado.speedups implemented websocket_mask without validating that the mask argument is exactly four bytes, allowing the C function to read up to three bytes beyond the provided buffer when reached through Tornado XSRF token decoding with the native extension active. This issue is fixed in version 6.5.6.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-15 13:23 UTC

CWE

CWE-126 - Buffer Over-read

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/tornadoweb/tornado/security/ad…	x_refsource_CONFIRM
https://github.com/tornadoweb/tornado/pull/3626	x_refsource_MISC
https://github.com/tornadoweb/tornado/commit/96dc…	x_refsource_MISC
https://github.com/tornadoweb/tornado/releases/ta…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
tornadoweb	tornado	Affected: < 6.5.6

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-49854",
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        }
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            "attackComplexity": "LOW",
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            "confidentialityImpact": "LOW",
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            "userInteraction": "NONE",
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          "name": "https://github.com/tornadoweb/tornado/pull/3626",
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            "x_refsource_MISC"
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          "url": "https://github.com/tornadoweb/tornado/pull/3626"
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          "name": "https://github.com/tornadoweb/tornado/commit/96dc88c2a05705287856b2cd6b4b4034f9a6aaac",
          "tags": [
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        },
        {
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          "url": "https://github.com/tornadoweb/tornado/releases/tag/v6.5.6"
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        "advisory": "GHSA-cx3h-4qpv-8hc9",
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      "title": "Tornado: Out-of-bounds memory access in C extension"
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  },
  "dataType": "CVE_RECORD",
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CVE-2026-49855 (GCVE-0-2026-49855)

Vulnerability from cvelistv5 – Published: 2026-07-14 20:45 – Updated: 2026-07-16 14:56

Title

tornado AsyncHTTPClient accumulates decompressed chunks without size limit (gzip bomb)

Summary

Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, Tornado gzip decompression routines processed limited-size chunks but did not enforce an overall limit on accumulated decompressed chunks, allowing a malicious server accessed by SimpleAsyncHTTPClient or an HTTPServer configured with decompress_request=True to consume effectively unlimited memory. This issue is fixed in version 6.5.6.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-16 14:55 UTC

CWE

CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/tornadoweb/tornado/security/ad…	x_refsource_CONFIRM
https://github.com/tornadoweb/tornado/pull/3626	x_refsource_MISC
https://github.com/tornadoweb/tornado/commit/ff80…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
tornadoweb	tornado	Affected: < 6.5.6

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-49855",
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                "role": "CISA Coordinator",
                "timestamp": "2026-07-16T14:55:32.574509Z",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

SUSE-SU-2026:22445-1

CVE-2026-49853 (GCVE-0-2026-49853)

CVE-2026-49854 (GCVE-0-2026-49854)

CVE-2026-49855 (GCVE-0-2026-49855)

Tags

Sightings

Nomenclature

Related by attack behaviour