CVE-2025-62593

Ray is vulnerable to RCE via Safari & Firefox Browsers through DNS Rebinding Attack

CVSS 4.0 Critical 9.4Known exploited (CISA KEV)

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Description

Ray is an AI compute engine. Prior to version 2.52.0, developers working with Ray as a development tool can be exploited via a critical RCE vulnerability exploitable via Firefox and Safari. This vulnerability is due to an insufficient guard against browser-based attacks, as the current defense uses the User-Agent header starting with the string "Mozilla" as a defense mechanism. This defense is insufficient as the fetch specification allows the User-Agent header to be modified. Combined with a DNS rebinding attack against the browser, and this vulnerability is exploitable against a developer running Ray who inadvertently visits a malicious website, or is served a malicious advertisement (malvertising). This issue has been patched in version 2.52.0.

Key data

CVSS 4.0 Critical 9.4

Score published by GitHub_M in the CVE record.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Attack vector: Network
The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity: Low
No measurable action is needed to get around the system's built-in security controls. The attack is repeatable.
Attack requirements: None
The attack works without any special deployment or execution conditions.
Privileges required: None
No account or privileges are needed.
User interaction: Passive
A user takes part without meaning to, for example by loading a page.
Vulnerable system: confidentiality: High
Serious or total effect on the secrecy of data.
Vulnerable system: integrity: High
Serious or total effect on the trustworthiness of data.
Vulnerable system: availability: High
Serious or total effect on availability.
Subsequent systems: confidentiality: High
Serious or total effect on other systems' data secrecy.
Subsequent systems: integrity: High
Serious or total effect on other systems' data trustworthiness.
Subsequent systems: availability: High
Serious or total effect on other systems' availability.

Metric	Value	What it means
Attack vector	Network	The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity	Low	No measurable action is needed to get around the system's built-in security controls. The attack is repeatable.
Attack requirements	None	The attack works without any special deployment or execution conditions.
Privileges required	None	No account or privileges are needed.
User interaction	Passive	A user takes part without meaning to, for example by loading a page.
Vulnerable system: confidentiality	High	Serious or total effect on the secrecy of data.
Vulnerable system: integrity	High	Serious or total effect on the trustworthiness of data.
Vulnerable system: availability	High	Serious or total effect on availability.
Subsequent systems: confidentiality	High	Serious or total effect on other systems' data secrecy.
Subsequent systems: integrity	High	Serious or total effect on other systems' data trustworthiness.
Subsequent systems: availability	High	Serious or total effect on other systems' availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score: 0.60150 (60.2% probability)
Percentile: 99.1%
Scores of: Nov 10, 2026
Model: v2026.06.15

CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog: Ray-Project Ray Code Injection Vulnerability
Added to the catalog: Aug 17, 2026
Federal due date: Aug 20, 2026

CISA assessment as of Aug 18, 2026

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation: Recorded by CISA as active
Automatable: yes
Technical impact: total

Weakness (CWE)

CWE catalog version 5.0.

CWE-94Improper Control of Generation of Code
CWE-352Cross-Site Request Forgery

Affected products

Products listed in the CVE record, as the CNA published them.

ray-project ray
- affected: < 2.52.0

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

Timeline

ID reservedOct 16, 2025
Record publishedNov 26, 2025
Added to CISA KEVAug 17, 2026
Record last updatedOct 1, 2026

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:09 UTC. Sources and licenses