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Curl Vulnerability Discovered by Anthropic's OSS Scanner

Curl Vulnerability Discovered by Anthropic's OSS Scanner

First seen 10 Oct 2026, 09:33 UTC • •
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ThreatCluster AI
ThreatCluster •October 10, 2026 at 11:33 UTC
  • •Anthropic's OSS Scanner found a serious curl vulnerability, one of the worst in years.
  • •The scanner operates without human review, raising concerns about the accuracy of its reports.
  • •As of October 2, only 6,123 out of 29,439 flagged vulnerabilities have been reviewed by external firms.

Anthropic's OSS Scanner, launched on October 8, 2026, identified a serious vulnerability in curl, described by maintainer Daniel Stenberg as one of the worst in years. The scanner has flagged 29,439 candidate vulnerabilities since November 1, 2025, but reports are generated without human review, raising concerns about their validity. As of October 2, external security firms had reviewed only 6,123 of these vulnerabilities. The scanner's findings are sent directly to open-source maintainers, who must verify the reports themselves. The vulnerability's CVE details and specific attack vectors have not been disclosed yet, but it is noted that unverified reports do not carry a 90-day disclosure deadline. This situation highlights the risks associated with automated vulnerability reporting without thorough validation.

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Timeline

2026-10-08
OSS Scanner launched
Anthropic launched the OSS Scanner, a free service for open-source projects to receive automated vulnerability reports.
www.implicator.ai
2026-10-09
Serious curl vulnerability reported
Anthropic's OSS Scanner uncovered a significant vulnerability in curl, described as one of the worst in years by maintainer Daniel Stenberg.
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Common questions

What is the nature of the curl vulnerability?
The specific details of the curl vulnerability have not been disclosed yet, but it is considered serious.
How many vulnerabilities has the OSS Scanner flagged?
The OSS Scanner has flagged 29,439 candidate vulnerabilities since its inception.
What should open-source maintainers do with the reports?
Maintainers are responsible for verifying the reports generated by the OSS Scanner, as they are not reviewed by humans.