OneUptime has WhatsApp Resend Verification Authorization Bypass

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L · score source

EPSS

• CVE-2026-30959: 0.39% estimated exploitation activity in the next 30 days; percentile 33.64 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Description The resend-verification-code endpoint allows any authenticated user to trigger a verification code resend for any UserWhatsApp record by ID. Ownership is not validated (unlike the verify endpoint). Affected Source - Endpoint: UserWhatsAppAPI.ts - Service: UserWhatsAppService.ts - Verify ownership (present in verify endpoint for comparison): UserWhatsAppAPI.ts Full Code Lines (UserWhatsAppAPI.ts) Resend path (authorization gap): Verify path (ownership check present): Prerequisites - Valid attacker account with access to a project - Attacker access token - A victim’s UserWhatsApp itemId belonging to the same project Steps to Reproduce 1. Set your attacker token: 2. Trigger resend for the victim’s item: Expected/Observed Behavior - HTTP 200 with {} body and a new verification code sent to the victim’s phone - No checks confirm that item.userId equals the authenticated user’s ID for the resend path Impact - Spam/DoS against victims’ phone numbers, social engineering pressure,…

Published by the source

10 Mar 2026, 01:15 UTC

Last modified by the source

10 Mar 2026, 19:01 UTC

Source last checked

26 Oct 2026, 12:43 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-cw6x-mw64-q6pv

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-cw6x-mw64-q6pv

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# Patch Next advisory brief: CVE-2026-30959

Advisory: OneUptime has WhatsApp Resend Verification Authorization Bypass
IDs: CVE-2026-30959, GHSA-cw6x-mw64-q6pv
Record: https://patchnext.com/advisories/cve-2026-30959 (revision 3, source checked 26 Oct 2026, 12:43 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @oneuptime/common 10.0.21. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @oneuptime/common: affected < 10.0.21; fixed in 10.0.21

## Suggested inspection (read-only)
- `npm ls @oneuptime/common --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @oneuptime/common.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-cw6x-mw64-q6pv (OSV record GHSA-cw6x-mw64-q6pv lists affected ranges: npm @oneuptime/common >=0 <10.0.21 (fixed))
- Verified: https://github.com/advisories/GHSA-cw6x-mw64-q6pv (GitHub-reviewed advisory GHSA-cw6x-mw64-q6pv lists affected ranges: npm @oneuptime/common >=0 <10.0.21)

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