ExploitedIn CISA KEVFix available

CVE-2025-62593

Q: Is CVE-2025-62593 actively exploited?

Yes. CVE-2025-62593 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-08-21.

Q: What is the CVSS score for CVE-2025-62593?

CVE-2025-62593 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Exploitation confirmed. First attested on 2026-08-18 by CISA-ADP, CISA KEV, GCVE · kevintel.

Published2025-11-26
Fixed in2.52.0
WeaknessCWE-352 · CWE-94

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2025-11-2623:15CVE publishedNVD
2026-08-18Listed as exploited by GCVEGCVE
2026-08-18Exploitation first reportedCISA KEV
2026-08-18Added to the CISA KEV catalogCISA KEV
2026-08-1803:55SSVC exploitation set to activeCISA-ADP
2026-10-2319:23First public proof of conceptPoC-in-GitHub
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2025-62593?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2025-62593?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Anyscale ray

Branch	Affected	Fixed in	Source
2.52	< 2.52.0	2.52.0	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

RHSA-2026:61627 Red Hat Product Security2 products fixed
Red Hat Security Advisory: Red Hat AI Inference Server 3.2.2 (CUDA)
RHSA-2026:3713 Red Hat Product Security1 product fixed
Red Hat Security Advisory: RHOAI 3.3 - Red Hat OpenShift AI
RHSA-2026:3462 Red Hat Product Security1 product fixed
Red Hat Security Advisory: Red Hat AI Inference Server 3.2.2 (ROCm)
RHSA-2026:3461 Red Hat Product Security2 products fixed
Red Hat Security Advisory: Red Hat AI Inference Server 3.2.2 (CUDA)
RHSA-2025:23204 Red Hat Product Security2 products fixed
Red Hat Security Advisory: Red Hat AI Inference Server 3.2.5 (CUDA)
RHSA-2025:23080 Red Hat Product Security2 products fixed
Red Hat Security Advisory: Red Hat AI Inference Server Model Optimization Tools 3.2.2 (CUDA)

2 more advisories

Full record on NVD

Fix

Update Anyscale ray to 2.52.0
CISA’s required action: 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.due 2026-08-21
Vendor fix Red Hat Product Security RHSA-2026:61627 · 2 productsFor more information visit https://access.redhat.com/errata/RHSA-2026:61627
Vendor fix Red Hat Product Security RHSA-2026:3713 · 1 productFor Red Hat OpenShift AI 3.3 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this errata update: https://docs.redhat.com/en/documentation/red_hat_openshift_ai/
Vendor fix Red Hat Product Security RHSA-2026:3462 · 1 productFor more information visit https://access.redhat.com/errata/RHSA-2026:3462
Vendor fix Red Hat Product Security RHSA-2026:3461 · 2 productsFor more information visit https://access.redhat.com/errata/RHSA-2026:3461
Vendor fix Red Hat Product Security RHSA-2025:23204 · 2 productsFor more information visit https://access.redhat.com/errata/RHSA-2025:23204
Vendor fix Red Hat Product Security RHSA-2025:23080 · 2 productsFor more information visit https://access.redhat.com/errata/RHSA-2025:23080

Advisories and patches

github.comPatch
github.comPatch · Vendor Advisory

Detection

read 2026-10-23 19:24 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 2 repositories, unverifiedBoreas37/CVE-2025-62593-PoCmaxprog-svg/CVE-2026-33017

CISA Known Exploited Vulnerability

Date Added: 2026-08-18
Patch Due Date: 2026-08-21
Ransomware Use: Unknown
Required Action: 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.

Sources

CISA KEVKEV entry2026-08-18
GCVEexploitation2026-08-18
CISA-ADPSSVC decisionactive2026-08-18
OpenCVESSVC decisionactive—
CNACVSS 4.09.4read 2026-10-23
NVDCVSS 3.18.8read 2026-10-23
CNAweakness (CWE)CWE-352, CWE-94read 2026-10-23
FIRST EPSSEPSS score62.5 %read 2026-10-23
PoC-in-GitHubproof of concept2read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 4.0 vector: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: 2025-11-26
Last Modified: 2026-10-19
NVD status: Analyzed

Frequently asked questions

What is CVE-2025-62593?

Is CVE-2025-62593 actively exploited?

Yes. CVE-2025-62593 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-08-21.

What is the CVSS score for CVE-2025-62593?

CVE-2025-62593 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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