CVE-2026-50882: anna-is-cute paste DoS Vulnerability – Patch Now

Technical summary

The /api/v0/pastes API endpoint in anna-is-cute paste v0.1.1 fails to properly validate or rate-limit incoming POST requests, enabling an unconfined resource consumption attack. The vulnerability is classified as CWE-400 (Uncontrolled Resource Consumption), indicating the application does not implement adequate input validation, request throttling, or resource bounds. An attacker with network access can trigger excessive resource allocation by submitting malformed or oversized payloads, exhausting server memory, CPU, or connection pools and forcing a service restart or degradation.

Business impact

Successful exploitation results in service downtime, preventing users from accessing or posting content to the paste service. For organizations relying on this tool for internal knowledge sharing, code snippet distribution, or temporary file hosting, an attack could disrupt workflows and collaboration. The severity is amplified in multi-tenant or public instances where a single attacker can impact many users simultaneously. Recovery requires manual intervention or automated failover mechanisms, both incurring operational costs and potential reputational damage if the service is customer-facing.

Affected systems

anna-is-cute paste version 0.1.1 is confirmed vulnerable. Organizations running this specific version should assume they are at risk. Verify your deployment version immediately. Earlier versions and later patched releases may have different vulnerability status; consult vendor release notes for confirmation.

Exploitability

This vulnerability has a network attack vector with low complexity and requires no user interaction or authentication. The CVSS 3.1 score of 7.5 (HIGH) reflects the ease of exploitation: any unauthenticated attacker with network connectivity can trigger the DoS condition without sophisticated tooling. The barrier to entry is minimal, making widespread automated scanning and exploitation likely if the vulnerability becomes public knowledge.

Remediation

Upgrade anna-is-cute paste to a patched version that addresses CWE-400 resource consumption issues. Verify the specific version number in the vendor's security advisory before deployment. Apply patches during a maintenance window to minimize service interruption. Until patching is complete, implement compensating controls: network-level rate limiting on the /api/v0/pastes endpoint, request size limits, and request-per-IP throttling to mitigate DoS impact.

Patch guidance

Consult the anna-is-cute paste project's official security advisory and release notes to identify the correct patched version. Apply updates in a test environment first to validate compatibility with your configuration. Once verified, schedule the upgrade during low-traffic periods to minimize user impact. Monitor application logs and performance metrics post-patch to confirm the vulnerability is resolved and no regressions have been introduced.

Detection guidance

Monitor your anna-is-cute paste logs for unusual POST request patterns to the /api/v0/pastes endpoint: sudden spikes in request volume, requests with abnormally large payloads, or requests originating from a single IP or small set of IPs. Implement alerting on HTTP 5xx responses or service restarts correlating with these patterns. Network-based detection can identify potential attacks by observing POST floods to that specific endpoint. Application performance monitoring (APM) tools should flag CPU or memory spikes coinciding with request surges.

Why prioritize this

With a CVSS score of 7.5 (HIGH), no authentication requirement, and straightforward network exploitability, this vulnerability merits urgent patching. While data confidentiality and integrity are not directly compromised, the availability impact is significant and easily triggered by any attacker. Organizations hosting anna-is-cute paste v0.1.1 should prioritize this as a critical operational risk and expedite remediation.

Risk score, explained

The CVSS 3.1 vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yields a score of 7.5 because: Attack Vector (AV:N) permits remote exploitation; Attack Complexity (AC:L) indicates minimal setup required; Privileges Required (PR:N) confirms no authentication needed; User Interaction (UI:N) means the attack is fully automatic; Scope (S:U) is unchanged; Confidentiality (C:N) and Integrity (I:N) are unaffected; and Availability (A:H) is completely compromised. The result is a HIGH-severity vulnerability suitable for immediate remediation in any operational environment.

Frequently asked questions