Vulnerability · Published Nov 3, 2026 · Assigned by VulnCheck

CVE-2026-121545Dreeve before 5.8.0 Missing Authentication in Strava Webhook POST Handler

Medium 6.5

In plain English

A medium-severity insufficient verification of data authenticity in dreeve from robiningelbrecht. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.2%top 89.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
robiningelbrecht	dreeve	0 – before 5.8.0

Weakness: CWE-345 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

References

GitHub Issue #2935 issue-tracking
https://github.com/dreeveapp/dreeve product
Fix commit patch
https://github.com/dreeveapp/dreeve/blob/v5.7.0/src/Controller/Strava/StravaWebhookRequestHandler.php#L64-L80 technical-description
https://github.com/dreeveapp/dreeve/blob/v5.7.0/src/Console/Strava/ProcessStravaWebhooksConsoleCommand.php technical-description
https://github.com/dreeveapp/dreeve/pull/2936 technical-description, patch, issue-tracking
VulnCheck Advisory: Dreeve before 5.8.0 Missing Authentication in Strava Webhook POST Handler third-party-advisory