yopass Prometheus metrics middleware allows remote memory exhaustion through unbounded method labels

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-107840
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-09 18:17:05 UTC
Updated2026-10-09 20:17:09 UTC
Descriptionyopass is a service for securely sharing secrets, passwords, and files. Prior to version 14.7.0, the Prometheus metrics middleware in pkg/server/server.go uses the attacker-controlled r.Method value directly as the method label for yopass_http_requests_total and yopass_http_request_duration_seconds. Because the catch-all route accepts arbitrary HTTP method tokens, an unauthenticated remote attacker can submit many unique methods and create metric series that the Prometheus registry never evicts. The resulting monotonic memory growth can OOM-kill the process, while the expanding registry also degrades /metrics scrape latency and can blind monitoring. This issue is fixed in version 14.7.0.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

Problem Types: CWE-400 | CWE-400 CWE-400: Uncontrolled Resource Consumption

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Jhaals Yopass affected < 14.7.0 Not specified

References

ReferenceSourceLinkTags
github.com/jhaals/yopass/commit/61e31ead04a4fc27ce80bed226af41c7c0426ccf [email protected] github.com
github.com/jhaals/yopass/pull/3773 [email protected] github.com
github.com/jhaals/yopass/commit/78d0c14f7085048130199662a2ec8a18ec8d6ebb [email protected] github.com
github.com/jhaals/yopass/security/advisories/GHSA-6r69-c6wg-7g8m [email protected] github.com
github.com/jhaals/yopass/releases/tag/14.7.0 [email protected] github.com
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