MSRXCVE-2025-62593
CVE-2025-62593
Ray is vulnerable to RCE via Safari & Firefox Browsers through DNS Rebinding Attack
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CVSS 4.0 · CNA
chance of exploitation in the next 30 days (EPSS; in the top 1% of all CVEs)
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.
Affected packages and fixed versions
| Package | Ecosystem | Fixed in |
|---|---|---|
| ray | PyPI | 2.52.0 |
Affected products
- ray-project ray: < 2.52.0
Also known as: GHSA-q279-jhrf-cc6v, PYSEC-2026-520
2 references (advisories, patches, write-ups)
- https://github.com/ray-project/ray/security/advisories/GHSA-q279-jhrf-cc6v · x_refsource_CONFIRM
- https://github.com/ray-project/ray/commit/70e7c72780bdec075dba6cad1afe0832772bfe09 · x_refsource_MISC
Sources: CVE.org, OSV.dev, FIRST EPSS. Missing ones did not answer or have no record yet.