rustypaste before 0.18.1 validates the destination path before applying the optional custom filename HTTP header, allowing attackers to bypass directory-escape checks. Attackers can supply path traversal sequences in the filename header to write files outside the configured upload directory to arbitrary locations.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
orhun rustypaste unaffected
Version Status Constraints
0 affected < 0.18.1

No data.

No data.

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/orhun/rustypaste cve-icon cve-icon
https://github.com/orhun/rustypaste/blob/v0.18.0/src/paste.rs cve-icon cve-icon
https://github.com/orhun/rustypaste/commit/ac05d552596af4a8429d80f30d11f67117ce02c8 cve-icon cve-icon
https://github.com/orhun/rustypaste/issues/622 cve-icon cve-icon
https://www.vulncheck.com/advisories/rustypaste-before-0.18.1-path-traversal-via-filename-header cve-icon cve-icon
History

Sun, 13 Sep 2026 11:00:00 +0000

Type Values Removed Values Added
Description rustypaste before 0.18.1 validates the destination path before applying the optional custom filename HTTP header, allowing attackers to bypass directory-escape checks. Attackers can supply path traversal sequences in the filename header to write files outside the configured upload directory to arbitrary locations.
Title rustypaste before 0.18.1 Path Traversal via filename header
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-13T10:45:44.589Z

Reserved: 2026-09-13T10:14:58.756Z

Link: CVE-2026-90774

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-13T11:17:02.163

Modified: 2026-09-13T11:17:02.163

Link: CVE-2026-90774

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-13T18:00:13Z

Weaknesses