Immediate
Before a patch is released, reduce exposure immediately and only allow trusted sources to reach the affected service.
root@hackertop:~/vulnfeed/CVE-2026-7790#
CVE-2026-7790
MEDIUM
RCE
⚠ Unpatched · Zero-day◉ PoC 公开
Lifecycle 4/7
ninenines cowlib up to 2.16.0 chunk-size resource consumption
LIFECYCLE
5.1
CVSS
Vulnerability Description
A vulnerability was found in ninenines cowlib up to 2.16.0. It has been classified as problematic. This affects an unknown code. Upgrading to version 2.16.1 eliminates this vulnerability. Applying the patch a4b8039ce8c93ab00867ef6b7e888822c09f4369 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.
Root Cause Analysis
The manipulation of the argument chunk-size with an unknown input leads to a unknown weakness. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
Impact: This is going to have an impact on availability.
Countermeasure: Upgrading to version 2.16.1 eliminates this vulnerability. Applying the patch a4b8039ce8c93ab00867ef6b7e888822c09f4369 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.
Impact: This is going to have an impact on availability.
Countermeasure: Upgrading to version 2.16.1 eliminates this vulnerability. Applying the patch a4b8039ce8c93ab00867ef6b7e888822c09f4369 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.
Validation (PoC/EXP) - Looking for Contributors
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Mitigation Plan - Sorted by Priority
High
Enable extra access controls, WAF/ACL, or reverse-proxy rules for cowlib.
High
Use logs and IOCs to hunt through production traffic and confirm whether exploitation traces already exist.
Medium
Keep this issue on the watch list and follow vendor advisories, rollback notices, and new variants.
Vulnerability Lifecycle - Click each stage to inspect details
The issue has entered HackerTop VulnFeed and is now being tracked by the community.
The vulnerability has been synchronized into the platform and entered the visible triage flow.
Initial impact validation is complete based on current disclosure, technical details, and public intelligence.
A public proof path already exists for reference.
No in-the-wild exploitation has been confirmed yet, but monitoring should continue.
No vendor patch is available yet. Apply temporary mitigations first.
Reduce exposure, restrict access, and inspect logs until a permanent fix is available.
5.1
CVSS
Temp Score
5.1
MEDIUM
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Metric Details
Attack Vector
Attack Vector
Network
Attack Complexity
Attack Complexity
Low
Privileges Required
Privileges Required
None
User Interaction
User Interaction
None
Confidentiality Impact
Confidentiality Impact
High
Integrity Impact
Integrity Impact
High
Availability Impact
Availability Impact
High
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CVE-2026-7790 · CVSS 5.1 · Active Threat
