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How CVE-2026-34650 Works
CVE-2026-34650 is an Uncontrolled Resource Consumption vulnerability (CWE-400) affecting Adobe Commerce and Magento Open Source. The flaw resides in an unknown function within the application’s request‑handling logic. By sending specially crafted HTTP requests to an affected Adobe Commerce instance, an unauthenticated remote attacker can force the application to consume excessive system resources—such as CPU, memory, or database connections—without any user interaction.
The vulnerability stems from the application’s failure to properly control internal resource consumption when processing certain inputs. An attacker can exploit this by repeatedly submitting malicious payloads that trigger expensive operations, eventually exhausting the server’s available resources. Once resources are depleted, the application becomes unresponsive or crashes, resulting in a denial‑of‑service (DoS) condition that disrupts legitimate user access and e‑commerce operations.
The attack vector is network‑based, requires low complexity, and does not require any privileges or user interaction, making it particularly dangerous for public‑facing storefronts. The vulnerability is rated 7.5 (High) on the CVSS v3.1 scale, with the vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. It affects all Adobe Commerce versions up to and including 2.4.9‑beta1, 2.4.8‑p4, 2.4.7‑p9, 2.4.6‑p14, 2.4.5‑p16, and 2.4.4‑p17, as well as all earlier releases.
Adobe addressed this issue in the APSB26‑49 security bulletin released on May 12, 2026. While no active exploitation in the wild has been confirmed at the time of writing, the low attack complexity and lack of authentication requirements make this a high‑priority target for automated denial‑of‑service campaigns. System administrators are strongly advised to apply the available patches immediately or implement compensatory controls such as rate limiting, request throttling, and continuous resource monitoring to mitigate the risk.
DailyCVE Form
| Field | Value |
|-|-|
| Platform | Adobe Commerce / Magento Open Source |
| Version | ≤ 2.4.9‑beta1, 2.4.8‑p4, 2.4.7‑p9, 2.4.6‑p14, 2.4.5‑p16, 2.4.4‑p17 |
| Vulnerability | Uncontrolled Resource Consumption (CWE‑400) |
| Severity | High (CVSS 7.5) |
| Date | 2026‑05‑12 |
| Prediction | 2026‑05‑12 (APSB26‑49 already released) |
What Undercode Say
Analytics & Threat Intelligence:
- EPSS Score: Not yet available, but the vulnerability is not listed in the CISA KEV catalog.
- Attack Surface: Public‑facing Adobe Commerce stores are the primary targets.
- Exploit Maturity: No public exploit has been released as of the advisory date, but automated DoS tools could easily adapt to this flaw.
- Deployment Priority: Adobe assigned a Deployment Priority 2 (medium‑high) to APSB26‑49.
Bash Commands & Code Snippets:
Check your Adobe Commerce version:
bin/magento --version
List installed patches (if using Composer):
composer show | grep magento
Apply the latest security patch via Composer (example for 2.4.7‑p9 → 2.4.7‑p10):
composer require magento/product-community-edition=2.4.7-p10 --no-update composer update
Enable rate limiting at the web server level (Nginx example):
limit_req_zone $binary_remote_addr zone=commerce:10m rate=10r/s;
location / {
limit_req zone=commerce burst=20 nodelay;
}
Monitor system resource usage in real time:
top -b -n 1 | grep -E "CPU|Mem" watch -n 1 'netstat -an | grep :80 | wc -l'
Exploit
An attacker can trigger the vulnerability by sending a high volume of specially crafted HTTP requests to any resource‑intensive endpoint of the Adobe Commerce application—for example, product search, catalog navigation, or checkout operations. Because the flaw does not require authentication, the attacker can launch the attack from any network position. The crafted requests cause the application to allocate and consume system resources (e.g., memory, database connections, or CPU cycles) without proper limits, eventually leading to resource exhaustion and application unresponsiveness. No user interaction is required, and the attack can be fully automated.
Protection
- Immediate Patching: Upgrade to the latest patched versions released in APSB26‑49 (e.g., 2.4.9‑GA, 2.4.8‑p5, 2.4.7‑p10, 2.4.6‑p15, 2.4.5‑p17, 2.4.4‑p18).
- Rate Limiting: Implement request rate limiting at the web server (Nginx/Apache) or application firewall level to throttle excessive requests from single IP addresses.
- Resource Monitoring: Continuously monitor CPU, memory, and request rates to detect anomalous spikes that may indicate an ongoing attack.
- Web Application Firewall (WAF): Deploy WAF rules to filter or block malicious request patterns associated with resource exhaustion attempts.
- Traffic Shaping: Use network filtering or traffic shaping to protect against automated abuse.
Impact
Successful exploitation of CVE‑2026‑34650 leads to a denial‑of‑service condition, rendering the Adobe Commerce storefront unavailable to legitimate customers. This can result in:
– Loss of revenue during downtime, especially for high‑traffic e‑commerce sites.
– Degraded user experience and customer abandonment.
– Operational disruption for backend administrators and order processing systems.
– Potential reputational damage due to prolonged service unavailability.
– Increased infrastructure costs if auto‑scaling is triggered by the resource exhaustion.
While the vulnerability does not allow data theft or code execution, the business impact of a prolonged DoS attack can be severe, making this a high‑priority issue for all Adobe Commerce deployments.
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Sources:
Reported By: nvd.nist.gov
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