Vulnerability · Published Aug 18, 2026 · Assigned by VulnCheck

CVE-2026-73529Plainpad Missing Rate Limiting via POST /v1/sessions

Medium 5.3

In plain English

A medium-severity security flaw in plainpad from alextselegidis. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.4%top 64.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Plainpad through 1.1.1, fixed in commit d3823fc, contains a missing rate limiting vulnerability that allows unauthenticated attackers to send unbounded login requests to the POST /v1/sessions endpoint due to dead code in App\Http\Kernel.php that is never instantiated under the Laravel 11+ skeleton, leaving the API throttle configuration unattached to any route. Attackers can exploit this by sending unlimited credential attempts with no lockout or CAPTCHA enforcement, and additionally trigger CPU exhaustion by forcing repeated bcrypt comparisons on each request.

Affected products (as reported)

Vendor	Product	Versions
alextselegidis	plainpad	0 – through 1.1.1

Weakness: CWE-307 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

Patch Commit patch
https://www.vulncheck.com/advisories/plainpad-missing-rate-limiting-via-post-v1-sessions third-party-advisory