Vulnerability-Lookup

RHSA-2026:37530

Vulnerability from csaf_redhat - Published: 2026-07-10 03:00 - Updated: 2026-10-05 18:07

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Moderate

Notes

Topic: An update for Red Hat Hardened Images RPMs is now available.

Details: This update includes the following RPMs: python-setuptools: * python-setuptools-wheel-83.0.0-4.hum1 (noarch) * python3-setuptools-83.0.0-4.hum1 (noarch) * python-setuptools-83.0.0-4.hum1.src (src)

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-59890

A flaw was found in setuptools, a Python package management tool. The FileList component, responsible for handling file exclusions, did not properly normalize Unicode file names when applying exclusion rules. This oversight could allow a specially crafted file name, using a different Unicode normalization form (NFD) on macOS APFS or HFS+ file systems, to bypass an intended exclusion rule (NFC). As a result, sensitive files that should have been excluded could be inadvertently included in a source distribution, leading to information disclosure.

6.1 (Medium)


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

CWE-1025 - Comparison Using Wrong Factors

Affected products

Fixed 5 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:python-setuptools-0:83.0.0-4.hum1@src	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:python-setuptools-wheel-0:83.0.0-4.hum1@noarch@public-hummingbird-aarch64-rpms	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:python-setuptools-wheel-0:83.0.0-4.hum1@noarch@public-hummingbird-x86_64-rpms	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:python3-setuptools-0:83.0.0-4.hum1@noarch@public-hummingbird-aarch64-rpms	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:python3-setuptools-0:83.0.0-4.hum1@noarch@public-hummingbird-x86_64-rpms	—	Vendor Fix fix Workaround

Threats

Impact Moderate

References

12 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:37530	self
https://images.redhat.com/	external
https://access.redhat.com/security/cve/CVE-2026-59890	external
https://access.redhat.com/security/updates/classi…	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-59890	self
https://bugzilla.redhat.com/show_bug.cgi?id=2498155	external
https://www.cve.org/CVERecord?id=CVE-2026-59890	external
https://nvd.nist.gov/vuln/detail/CVE-2026-59890	external
https://github.com/pypa/setuptools/commit/dd9f436…	external
https://github.com/pypa/setuptools/releases/tag/v83.0.0	external
https://github.com/pypa/setuptools/security/advis…	external

JSON

To clipboard

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      "cwe": {
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        "name": "Comparison Using Wrong Factors"
      },
      "discovery_date": "2026-07-08T17:02:04.022644+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2498155"
        }
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          "category": "description",
          "text": "A flaw was found in setuptools, a Python package management tool. The FileList component, responsible for handling file exclusions, did not properly normalize Unicode file names when applying exclusion rules. This oversight could allow a specially crafted file name, using a different Unicode normalization form (NFD) on macOS APFS or HFS+ file systems, to bypass an intended exclusion rule (NFC). As a result, sensitive files that should have been excluded could be inadvertently included in a source distribution, leading to information disclosure.",
          "title": "Vulnerability description"
        },
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          "category": "summary",
          "text": "setuptools: setuptools: MANIFEST.in exclusion bypass in sdist via Unicode normalization collision (NFC/NFD)",
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          "Red Hat Hardened Images:python-setuptools-wheel-0:83.0.0-4.hum1@noarch@public-hummingbird-x86_64-rpms",
          "Red Hat Hardened Images:python3-setuptools-0:83.0.0-4.hum1@noarch@public-hummingbird-aarch64-rpms",
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        {
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          "category": "vendor_fix",
          "date": "2026-07-10T03:00:58+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
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            "Red Hat Hardened Images:python-setuptools-wheel-0:83.0.0-4.hum1@noarch@public-hummingbird-x86_64-rpms",
            "Red Hat Hardened Images:python3-setuptools-0:83.0.0-4.hum1@noarch@public-hummingbird-aarch64-rpms",
            "Red Hat Hardened Images:python3-setuptools-0:83.0.0-4.hum1@noarch@public-hummingbird-x86_64-rpms"
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          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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            "Red Hat Hardened Images:python-setuptools-wheel-0:83.0.0-4.hum1@noarch@public-hummingbird-x86_64-rpms",
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            "Red Hat Hardened Images:python3-setuptools-0:83.0.0-4.hum1@noarch@public-hummingbird-x86_64-rpms"
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N",
            "version": "3.1"
          },
          "products": [
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            "Red Hat Hardened Images:python-setuptools-wheel-0:83.0.0-4.hum1@noarch@public-hummingbird-x86_64-rpms",
            "Red Hat Hardened Images:python3-setuptools-0:83.0.0-4.hum1@noarch@public-hummingbird-aarch64-rpms",
            "Red Hat Hardened Images:python3-setuptools-0:83.0.0-4.hum1@noarch@public-hummingbird-x86_64-rpms"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
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      "title": "setuptools: setuptools: MANIFEST.in exclusion bypass in sdist via Unicode normalization collision (NFC/NFD)"
    }
  ]
}

CVE-2026-59890 (GCVE-0-2026-59890)

Vulnerability from cvelistv5 – Published: 2026-07-08 16:02 – Updated: 2026-07-08 16:44

Title

setuptools: MANIFEST.in exclusion bypass in sdist via Unicode normalization collision (NFC/NFD) on macOS APFS/HFS+

Summary

setuptools is a package that allows users to download, build, install, upgrade, and uninstall Python packages. Prior to 83.0.0, FileList applied MANIFEST.in exclude, global-exclude, recursive-exclude, and prune directives by matching compiled glob patterns against on-disk file names without Unicode normalization, so on macOS APFS or HFS+ an NFD file name could bypass an NFC exclusion rule and be packed into a source distribution. This issue is fixed in version 83.0.0.

Severity

6.1 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-08 16:44 UTC

CWE

CWE-176 - Improper Handling of Unicode Encoding
CWE-697 - Incorrect Comparison

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7565 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/pypa/setuptools/security/advis…	x_refsource_CONFIRM
https://github.com/pypa/setuptools/commit/dd9f436…	x_refsource_MISC
https://github.com/pypa/setuptools/releases/tag/v83.0.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
pypa	setuptools	Affected: < 83.0.0

Show details on NVD website

JSON

To clipboard

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                "timestamp": "2026-07-08T16:44:32.194805Z",
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          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/pypa/setuptools/security/advisories/GHSA-h35f-9h28-mq5c"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "setuptools",
          "vendor": "pypa",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 83.0.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "setuptools is a package that allows users to download, build, install, upgrade, and uninstall Python packages. Prior to 83.0.0, FileList applied MANIFEST.in exclude, global-exclude, recursive-exclude, and prune directives by matching compiled glob patterns against on-disk file names without Unicode normalization, so on macOS APFS or HFS+ an NFD file name could bypass an NFC exclusion rule and be packed into a source distribution. This issue is fixed in version 83.0.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-176",
              "description": "CWE-176: Improper Handling of Unicode Encoding",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-697",
              "description": "CWE-697: Incorrect Comparison",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-08T16:02:07.519Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/pypa/setuptools/security/advisories/GHSA-h35f-9h28-mq5c",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/pypa/setuptools/security/advisories/GHSA-h35f-9h28-mq5c"
        },
        {
          "name": "https://github.com/pypa/setuptools/commit/dd9f436a36486b4cb8a4c70a2321548b0be09b8f",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pypa/setuptools/commit/dd9f436a36486b4cb8a4c70a2321548b0be09b8f"
        },
        {
          "name": "https://github.com/pypa/setuptools/releases/tag/v83.0.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pypa/setuptools/releases/tag/v83.0.0"
        }
      ],
      "source": {
        "advisory": "GHSA-h35f-9h28-mq5c",
        "discovery": "UNKNOWN"
      },
      "title": "setuptools: MANIFEST.in exclusion bypass in sdist via Unicode normalization collision (NFC/NFD) on macOS APFS/HFS+"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-59890",
    "datePublished": "2026-07-08T16:02:07.519Z",
    "dateReserved": "2026-07-07T16:40:07.983Z",
    "dateUpdated": "2026-07-08T16:44:52.269Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.

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

RHSA-2026:37530

CVE-2026-59890 (GCVE-0-2026-59890)

Tags

Sightings

Nomenclature

Related by attack behaviour