How severe is CVE-2026-53755?

CVE-2026-53755 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-53755 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-53755?

CVE-2026-53755 affects Kidocode Crawl4ai. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-53755?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-53755 have an EU (EUVD) identifier?

Yes. CVE-2026-53755 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38567.

When was CVE-2026-53755 published?

CVE-2026-53755 was published on 2026-06-23 and last updated on 2026-06-29.

CVE-2026-53755

CVE-2026-53755 is a high-severity vulnerability in Kidocode Crawl4ai with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38567
Weakness: CWE-918
Affected product: Kidocode Crawl4ai
Published: 2026-06-23
Last modified: 2026-06-29

Description

Crawl4AI is an open-source LLM friendly web crawler & scraper. Prior to 0.8.9, the Docker API server applied its SSRF destination check to the crawl target URL only, not to the proxy address. An unauthenticated request could supply a proxy pointing at an internal IP and route the browser through it, reaching internal services and cloud-metadata endpoints, while using a perfectly valid crawl URL. The Docker API is unauthenticated by default. /crawl, /crawl/stream, and /crawl/job accept a browser_config (and crawler_config). The following all feed Chromium's egress and were unchecked: browser_config.proxy_config.server, browser_config.proxy (deprecated field), crawler_config.proxy_config.server, and --proxy-server / --proxy-pac-url / --proxy-bypass-list / --host-resolver-rules flags in browser_config.extra_args. This vulnerability is fixed in 0.8.9.

Frequently asked questions

What is CVE-2026-53755?: Crawl4AI is an open-source LLM friendly web crawler & scraper. Prior to 0.8.9, the Docker API server applied its SSRF destination check to the crawl target URL only, not to the proxy address. An unauthenticated request could supply a proxy pointing at an internal IP and route the browser through it, reaching internal services and cloud-metadata endpoints, while using a perfectly valid crawl URL. The Docker API is unauthenticated by default. /crawl, /crawl/stream, and /crawl/job accept a browser_config (and crawler_config). The following all feed Chromium's egress and were unchecked: browser_config.proxy_config.server, browser_config.proxy (deprecated field), crawler_config.proxy_config.server, and --proxy-server / --proxy-pac-url / --proxy-bypass-list / --host-resolver-rules flags in browser_config.extra_args. This vulnerability is fixed in 0.8.9.
How severe is CVE-2026-53755?: CVE-2026-53755 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-53755 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-53755?: CVE-2026-53755 affects Kidocode Crawl4ai. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-53755?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-53755 have an EU (EUVD) identifier?: Yes. CVE-2026-53755 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38567.
When was CVE-2026-53755 published?: CVE-2026-53755 was published on 2026-06-23 and last updated on 2026-06-29.

References

https://github.com/unclecode/crawl4ai/security/advisories/GHSA-6qhc-x826-342c

Affected products (1)

cpe:2.3:a:kidocode:crawl4ai:*:*:*:*:*:*:*:*

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