Dreeve accepts forged Strava webhook events, deleting activities
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-345.
Summary
Dreeve before 5.8.0 does not authenticate incoming Strava webhook requests, so unauthenticated remote attackers can forge webhook events. The handler in StravaWebhookRequestHandler does not check a signature, verify token or owner_id (CWE-345). An attacker who knows a public Strava activity id can send a forged delete event to the webhook URL and permanently delete the imported activities and their streams. The CVSS 4.0 vector rates the impact on integrity and availability as low.
Written with Claude Haiku 5.5 from the sources below · 2026-11-07
Description from the CNA
Dreeve before 5.8.0 contains a missing authentication vulnerability in StravaWebhookRequestHandler::handleEvent that allows unauthenticated attackers to forge Strava webhook events without signature, verify-token or owner_id checks. Attackers can send forged delete events with a known public Strava activity id to the webhook URL, causing permanent deletion of imported activities and their streams.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| robiningelbrecht | dreeve | before 5.8.0 | 5.8.0 | Patch available | CNA |
- dreeve Vendorrobiningelbrecht Affected before 5.8.0 Fixed in 5.8.0 Patch available CNA
Remediation
Update Dreeve to version 5.8.0 or later, which fixes this issue.
Written with Claude Haiku 5.5 from the sources below · 2026-11-07
- Fix · CNA dreeve (robiningelbrecht) Fixed in 5.8.0
Timeline
- 2026-11-03 Threatist record created from CVE-2026-121545
- 2026-11-03 Alias added: GHSA-vwg6-vcv8-xg59
- 2026-11-05 Priority changed: MEDIUM → LOW
- 2026-11-07 CISA SSVC decision points changed
- 2026-11-07 Priority changed: LOW → HIGH
References
Sources
- CVE-2026-121545 · CVE Program
- CVE-2026-121545 · NVD
- FIRST EPSS
- GHSA-vwg6-vcv8-xg59 · GitHub Advisory Database · CC BY 4.0
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