Vulnerability-Lookup

CVE-2026-42795 (GCVE-0-2026-42795)

Vulnerability from cvelistv5 – Published: 2026-06-02 13:41 – Updated: 2026-06-02 19:14

Title

Symlink Following in Hex Package Export Allows Embedding Files Outside Project Root

Summary

Symlink following vulnerability in Gleam's Hex package export allows files outside the project root to be embedded in the generated package tarball. The file collection helpers (gleam_files, native_files, private_files) in compiler-cli/src/fs.rs use follow_links(true) when walking publishable directories such as src/ and priv/. The collected paths are added to the package archive via add_path_to_tar in compiler-cli/src/publish.rs without verifying that the resolved target remains within the project root. A symlink placed under a publishable directory will cause gleam export hex-tarball or gleam publish to embed the contents of the symlink target into the generated Hex package. An attacker with write access to the project repository can place a symlink in src/ or priv/ pointing to an arbitrary file. When a maintainer or CI pipeline runs gleam publish or gleam export hex-tarball, local files readable by the publisher (such as secrets, tokens, or SSH keys) are silently embedded into the published package artifact. This issue affects Gleam from 0.10.0-rc1 until 1.17.0.

Severity

5.1 (Medium)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Assigner

EEF

References

4 references

URL	Tags
https://github.com/gleam-lang/gleam/security/advi…	vendor-advisoryrelated
https://cna.erlef.org/cves/CVE-2026-42795.html	related
https://osv.dev/vulnerability/EEF-CVE-2026-42795	related
https://github.com/gleam-lang/gleam/commit/6435a5…	patch

Impacted products

3 products

Vendor	Product	Version
Gleam	Gleam	Affected: 0.10.0-rc1 , < 1.17.0 (semver) cpe:2.3:a:gleam-lang:gleam::::::::
Gleam	Gleam	Affected: 0.10.0-rc1 , < 1.17.0 (semver) Affected: c82a2d83bd0c06cafdc196820deb3f89a9b3ff7c , < 6435a5528b9ae0449e2f32be579641ec485f6866 (git) cpe:2.3:a:gleam-lang:gleam::::::::
Gleam	Gleam	Affected: v0.10.0-rc1-elixir , < v1.17.0-elixir (other) Affected: v0.10.0-rc1-erlang , < v1.17.0-erlang (other) Affected: v0.10.0-rc1-node , < v1.17.0-node (other) Affected: v0.10.0-rc1-node-slim , < v1.17.0-node-slim (other) Affected: v0.10.0-rc1-elixir-slim , < v1.17.0-elixir-slim (other) Affected: v0.10.0-rc1-erlang-slim , < v1.17.0-erlang-slim (other) Affected: v0.10.0-rc1-erlang-alpine , < v1.17.0-erlang-alpine (other) Affected: v0.10.0-rc1-elixir-alpine , < v1.17.0-elixir-alpine (other) Affected: v0.10.0-rc1-node-alpine , < v1.17.0-node-alpine (other) Affected: v0.10.0-rc1-scratch , < v1.17.0-scratch (other) cpe:2.3:a:gleam-lang:gleam::::::::

Credits

Aly (spect3r1) Abdelrahman Ahmed Aboelkasem (0x2face) Louis Pilfold Jonatan Männchen / EEF

Show details on NVD website

JSON

To clipboard

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The collected paths are added to the package archive via add_path_to_tar in compiler-cli/src/publish.rs without verifying that the resolved target remains within the project root. A symlink placed under a publishable directory will cause gleam export hex-tarball or gleam publish to embed the contents of the symlink target into the generated Hex package.\\n\\nAn attacker with write access to the project repository can place a symlink in src/ or priv/ pointing to an arbitrary file. When a maintainer or CI pipeline runs gleam publish or gleam export hex-tarball, local files readable by the publisher (such as secrets, tokens, or SSH keys) are silently embedded into the published package artifact.\\n\\nThis issue affects Gleam from 0.10.0-rc1 until 1.17.0.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eSymlink following vulnerability in Gleam\u0027s Hex package export allows files outside the project root to be embedded in the generated package tarball.\u003c/p\u003e\u003cp\u003eThe file collection helpers (\u003ctt\u003egleam_files\u003c/tt\u003e, \u003ctt\u003enative_files\u003c/tt\u003e, \u003ctt\u003eprivate_files\u003c/tt\u003e) in \u003ctt\u003ecompiler-cli/src/fs.rs\u003c/tt\u003e use \u003ctt\u003efollow_links(true)\u003c/tt\u003e when walking publishable directories such as \u003ctt\u003esrc/\u003c/tt\u003e and \u003ctt\u003epriv/\u003c/tt\u003e. 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    }
  }
}

FKIE_CVE-2026-42795

Vulnerability from fkie_nvd - Published: 2026-06-02 14:16 - Updated: 2026-06-02 16:16

Severity

5.1 (Medium) - CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://cna.erlef.org/cves/CVE-2026-42795.html
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/gleam-lang/gleam/commit/6435a5528b9ae0449e2f32be579641ec485f6866
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/gleam-lang/gleam/security/advisories/GHSA-qhh5-fg4c-8gqc
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://osv.dev/vulnerability/EEF-CVE-2026-42795
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/gleam-lang/gleam/security/advisories/GHSA-qhh5-fg4c-8gqc

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Symlink following vulnerability in Gleam\u0027s Hex package export allows files outside the project root to be embedded in the generated package tarball.\n\nThe file collection helpers (gleam_files, native_files, private_files) in compiler-cli/src/fs.rs use follow_links(true) when walking publishable directories such as src/ and priv/. The collected paths are added to the package archive via add_path_to_tar in compiler-cli/src/publish.rs without verifying that the resolved target remains within the project root. A symlink placed under a publishable directory will cause gleam export hex-tarball or gleam publish to embed the contents of the symlink target into the generated Hex package.\n\nAn attacker with write access to the project repository can place a symlink in src/ or priv/ pointing to an arbitrary file. When a maintainer or CI pipeline runs gleam publish or gleam export hex-tarball, local files readable by the publisher (such as secrets, tokens, or SSH keys) are silently embedded into the published package artifact.\n\nThis issue affects Gleam from 0.10.0-rc1 until 1.17.0."
    }
  ],
  "id": "CVE-2026-42795",
  "lastModified": "2026-06-02T16:16:40.670",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.1,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "ACTIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-06-02T14:16:53.883",
  "references": [
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://cna.erlef.org/cves/CVE-2026-42795.html"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/gleam-lang/gleam/commit/6435a5528b9ae0449e2f32be579641ec485f6866"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/gleam-lang/gleam/security/advisories/GHSA-qhh5-fg4c-8gqc"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-42795"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/gleam-lang/gleam/security/advisories/GHSA-qhh5-fg4c-8gqc"
    }
  ],
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-59"
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "type": "Secondary"
    }
  ]
}

OPENSUSE-SU-2026:10953-1

Vulnerability from csaf_opensuse - Published: 2026-06-04 00:00 - Updated: 2026-06-04 00:00

Summary

gleam-1.17.0-1.1 on GA media

Severity

Moderate

Notes

Title of the patch: gleam-1.17.0-1.1 on GA media

Description of the patch: These are all security issues fixed in the gleam-1.17.0-1.1 package on the GA media of openSUSE Tumbleweed.

Patchnames: openSUSE-Tumbleweed-2026-10953

CVE-2026-32685

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: openSUSE Tumbleweed:gleam-1.17.0-1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:gleam-1.17.0-1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:gleam-1.17.0-1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:gleam-1.17.0-1.1.x86_64	—	Vendor Fix

Threats

Impact moderate

CVE-2026-42795

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: openSUSE Tumbleweed:gleam-1.17.0-1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:gleam-1.17.0-1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:gleam-1.17.0-1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:gleam-1.17.0-1.1.x86_64	—	Vendor Fix

Threats

Impact moderate

CVE-2026-43965

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: openSUSE Tumbleweed:gleam-1.17.0-1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:gleam-1.17.0-1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:gleam-1.17.0-1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:gleam-1.17.0-1.1.x86_64	—	Vendor Fix

Threats

Impact moderate

References

11 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://www.suse.com/security/cve/CVE-2026-32685/	self
https://www.suse.com/security/cve/CVE-2026-42795/	self
https://www.suse.com/security/cve/CVE-2026-43965/	self
https://www.suse.com/security/cve/CVE-2026-32685	external
https://bugzilla.suse.com/1267396	external
https://www.suse.com/security/cve/CVE-2026-42795	external
https://bugzilla.suse.com/1267397	external
https://www.suse.com/security/cve/CVE-2026-43965	external
https://bugzilla.suse.com/1267398	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "namespace": "https://www.suse.com/support/security/rating/",
      "text": "moderate"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright 2024 SUSE LLC. All rights reserved.",
      "tlp": {
        "label": "WHITE",
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    "lang": "en",
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        "text": "openSUSE-Tumbleweed-2026-10953",
        "title": "Patchnames"
      },
      {
        "category": "legal_disclaimer",
        "text": "CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).",
        "title": "Terms of use"
      }
    ],
    "publisher": {
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        "category": "self",
        "summary": "URL of this CSAF notice",
        "url": "https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_10953-1.json"
      },
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        "url": "https://www.suse.com/security/cve/CVE-2026-43965/"
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    "title": "gleam-1.17.0-1.1 on GA media",
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      "revision_history": [
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          "date": "2026-06-04T00:00:00Z",
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    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "gleam-1.17.0-1.1.aarch64",
                "product": {
                  "name": "gleam-1.17.0-1.1.aarch64",
                  "product_id": "gleam-1.17.0-1.1.aarch64"
                }
              }
            ],
            "category": "architecture",
            "name": "aarch64"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "gleam-1.17.0-1.1.ppc64le",
                "product": {
                  "name": "gleam-1.17.0-1.1.ppc64le",
                  "product_id": "gleam-1.17.0-1.1.ppc64le"
                }
              }
            ],
            "category": "architecture",
            "name": "ppc64le"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "gleam-1.17.0-1.1.s390x",
                "product": {
                  "name": "gleam-1.17.0-1.1.s390x",
                  "product_id": "gleam-1.17.0-1.1.s390x"
                }
              }
            ],
            "category": "architecture",
            "name": "s390x"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "gleam-1.17.0-1.1.x86_64",
                "product": {
                  "name": "gleam-1.17.0-1.1.x86_64",
                  "product_id": "gleam-1.17.0-1.1.x86_64"
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          },
          {
            "branches": [
              {
                "category": "product_name",
                "name": "openSUSE Tumbleweed",
                "product": {
                  "name": "openSUSE Tumbleweed",
                  "product_id": "openSUSE Tumbleweed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:opensuse:tumbleweed"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "SUSE Linux Enterprise"
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "gleam-1.17.0-1.1.aarch64 as component of openSUSE Tumbleweed",
          "product_id": "openSUSE Tumbleweed:gleam-1.17.0-1.1.aarch64"
        },
        "product_reference": "gleam-1.17.0-1.1.aarch64",
        "relates_to_product_reference": "openSUSE Tumbleweed"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "gleam-1.17.0-1.1.ppc64le as component of openSUSE Tumbleweed",
          "product_id": "openSUSE Tumbleweed:gleam-1.17.0-1.1.ppc64le"
        },
        "product_reference": "gleam-1.17.0-1.1.ppc64le",
        "relates_to_product_reference": "openSUSE Tumbleweed"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "gleam-1.17.0-1.1.s390x as component of openSUSE Tumbleweed",
          "product_id": "openSUSE Tumbleweed:gleam-1.17.0-1.1.s390x"
        },
        "product_reference": "gleam-1.17.0-1.1.s390x",
        "relates_to_product_reference": "openSUSE Tumbleweed"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "gleam-1.17.0-1.1.x86_64 as component of openSUSE Tumbleweed",
          "product_id": "openSUSE Tumbleweed:gleam-1.17.0-1.1.x86_64"
        },
        "product_reference": "gleam-1.17.0-1.1.x86_64",
        "relates_to_product_reference": "openSUSE Tumbleweed"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-32685",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-32685"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Path traversal vulnerability in Gleam\u0027s handling of custom documentation pages allows arbitrary file read and file write outside the intended documentation output directory.\n\nThe documentation.pages entries from gleam.toml are incorporated into filesystem paths without sufficient validation or confinement to the intended project and documentation output directories. The documentation.pages[].path field can be used to write generated documentation files outside the intended build/dev/docs/\u003cpackage\u003e/ output directory. The documentation.pages[].source field can be used to read files outside the project directory and embed their contents into generated documentation output.\n\nAn attacker who can convince a victim to run gleam docs build on an untrusted project, or with untrusted gleam.toml content, can cause local files readable by the victim to be included in generated documentation artifacts, and can cause generated documentation files to be written outside the intended docs output directory.\n\nThis issue affects Gleam from 1.16.0 until 1.17.0.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "openSUSE Tumbleweed:gleam-1.17.0-1.1.aarch64",
          "openSUSE Tumbleweed:gleam-1.17.0-1.1.ppc64le",
          "openSUSE Tumbleweed:gleam-1.17.0-1.1.s390x",
          "openSUSE Tumbleweed:gleam-1.17.0-1.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-32685",
          "url": "https://www.suse.com/security/cve/CVE-2026-32685"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1267396 for CVE-2026-32685",
          "url": "https://bugzilla.suse.com/1267396"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "openSUSE Tumbleweed:gleam-1.17.0-1.1.aarch64",
            "openSUSE Tumbleweed:gleam-1.17.0-1.1.ppc64le",
            "openSUSE Tumbleweed:gleam-1.17.0-1.1.s390x",
            "openSUSE Tumbleweed:gleam-1.17.0-1.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-06-04T00:00:00Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-32685"
    },
    {
      "cve": "CVE-2026-42795",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-42795"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Symlink following vulnerability in Gleam\u0027s Hex package export allows files outside the project root to be embedded in the generated package tarball.\n\nThe file collection helpers (gleam_files, native_files, private_files) in compiler-cli/src/fs.rs use follow_links(true) when walking publishable directories such as src/ and priv/. The collected paths are added to the package archive via add_path_to_tar in compiler-cli/src/publish.rs without verifying that the resolved target remains within the project root. A symlink placed under a publishable directory will cause gleam export hex-tarball or gleam publish to embed the contents of the symlink target into the generated Hex package.\n\nAn attacker with write access to the project repository can place a symlink in src/ or priv/ pointing to an arbitrary file. When a maintainer or CI pipeline runs gleam publish or gleam export hex-tarball, local files readable by the publisher (such as secrets, tokens, or SSH keys) are silently embedded into the published package artifact.\n\nThis issue affects Gleam from 0.10.0-rc1 until 1.17.0.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "openSUSE Tumbleweed:gleam-1.17.0-1.1.aarch64",
          "openSUSE Tumbleweed:gleam-1.17.0-1.1.ppc64le",
          "openSUSE Tumbleweed:gleam-1.17.0-1.1.s390x",
          "openSUSE Tumbleweed:gleam-1.17.0-1.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-42795",
          "url": "https://www.suse.com/security/cve/CVE-2026-42795"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1267397 for CVE-2026-42795",
          "url": "https://bugzilla.suse.com/1267397"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "openSUSE Tumbleweed:gleam-1.17.0-1.1.aarch64",
            "openSUSE Tumbleweed:gleam-1.17.0-1.1.ppc64le",
            "openSUSE Tumbleweed:gleam-1.17.0-1.1.s390x",
            "openSUSE Tumbleweed:gleam-1.17.0-1.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-06-04T00:00:00Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-42795"
    },
    {
      "cve": "CVE-2026-43965",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-43965"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Path traversal vulnerability in Gleam\u0027s dependency management allows arbitrary directory deletion via malicious build/packages/packages.toml content.\n\nPackage keys read from build/packages/packages.toml by LocalPackages::read_from_disc are passed without validation to paths.build_packages_package(), which constructs a filesystem path by joining the project build directory with the attacker-controlled key. The resulting path is then passed to fs::delete_directory (which calls remove_dir_all). No check is performed to ensure the path remains within the intended build/packages/ directory. Both absolute paths and relative traversal sequences (e.g. ../) are accepted as package keys, allowing deletion of arbitrary directories.\n\nAn attacker who can cause a victim to run gleam deps download on a project containing a malicious build/packages/packages.toml (e.g. by committing the normally-gitignored file to a repository) can cause arbitrary directories on the victim\u0027s system to be recursively deleted.\n\nThis issue affects Gleam from 0.18.0-rc1 until 1.17.0.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "openSUSE Tumbleweed:gleam-1.17.0-1.1.aarch64",
          "openSUSE Tumbleweed:gleam-1.17.0-1.1.ppc64le",
          "openSUSE Tumbleweed:gleam-1.17.0-1.1.s390x",
          "openSUSE Tumbleweed:gleam-1.17.0-1.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-43965",
          "url": "https://www.suse.com/security/cve/CVE-2026-43965"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1267398 for CVE-2026-43965",
          "url": "https://bugzilla.suse.com/1267398"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "openSUSE Tumbleweed:gleam-1.17.0-1.1.aarch64",
            "openSUSE Tumbleweed:gleam-1.17.0-1.1.ppc64le",
            "openSUSE Tumbleweed:gleam-1.17.0-1.1.s390x",
            "openSUSE Tumbleweed:gleam-1.17.0-1.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-06-04T00:00:00Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-43965"
    }
  ]
}

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.

Action not permitted

CVE-2026-42795 (GCVE-0-2026-42795)

FKIE_CVE-2026-42795

OPENSUSE-SU-2026:10953-1

Tags

Sightings

Nomenclature