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2026-10-17 21:56 CEST · Intelligence refreshed (Europe/Stockholm)

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Latest synchronized CVE
CVSS 4.3 Published 2026-10-17 21:00 CEST
Vendor
Affected products
1 affected products/devices 1 software
General vulnerability query Recent High & critical CVEs

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CVSS 9.3/10 Critical severity

First published: 14 October 2026, 19:36 CEST · Last modified: 16 October 2026, 22:12 CEST

CVE lookup — correlated security and lifecycle intelligence

· 7 sources correlated

Critical severity — prioritize remediation

When a TLS 1.3 client processes a HelloRetryRequest, it copies the server's cookie into its second ClientHello without checking that the cookie fits in the outgoing packet. Both the length …

SeverityCVSS 9.3Critical · Remote / network
ExploitationNone reportedEPSS 0.3% chance in 30 days
Affected products33 products33 softwareEvidence7 sourcesindependent intelligence collections

Why this rating

  • It can be exploited remotely over the network.
  • Weakness type: Out-of-bounds write (CWE-787).
  • Rated critical (CVSS 9.3); no exploitation is reported in current sources.

What to do

  1. Check your inventory against the 33 affected products — start with internet-facing systems.
Vendor
Affected products
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+27 more

Affected products (examples)

Click to open the full list
Eclipse Foundation NetX DuoEclipse FoundationcustomAFFECTED_FIELDGITv6.4.1_relAll 33 →

What the vulnerability is

When a TLS 1.3 client processes a HelloRetryRequest, it copies the server's cookie into its second ClientHello without checking that the cookie fits in the outgoing packet. Both the length and the contents of that cookie come from the peer, and the write happens before certificate authentication completes, so a malicious or compromised server can overwrite memory past the caller supplied TLS packet buffer without presenting a certificate. Only the client path is affected.

Detailed evidence Everything below supports the summary above. Open only what you need.

Matched intelligence coverage 7 sources
EUVD Vulnrichment OSV EPSS CWE CVE Affected Products
Cross-source correlations 7 matched lanes

Direct intelligence-source relationships

Direct intelligence-source lanes: every lane below has direct evidence for

in that Scantide intelligence collection. Lanes share the CVE as their join key; their presence together does not imply that one source explicitly referenced another source's record.

7 matched source lanes
ENISA EUVD CISA Vulnrichment OSV EPSS MITRE CWE CVE / NVD catalog Affected products/devices · 33
Downstream affected vendors 1 vendors

Affected vendor/product relationships

These vendors are derived from affected product/device evidence tied to this CVE. This is intentionally separate from the direct intelligence-source lanes above: a vendor can have affected products without Scantide having a vendor-specific advisory or Microsoft KB record for the CVE.

 1 affected vendors represented

Affected software, operating systems, hardware and devices 33

Deduplicated across Scantide's structured CVE, NVD applicability, CSAF, vendor advisory, campaign and downstream product evidence. Taxonomy IDs and evidence-only identifiers are excluded from the asset count. Counts represent relationships Scantide can currently prove, not the theoretical maximum downstream ecosystem.

33Software / applications
NVD/CVE catalog 1CISA Vulnrichment 4Osv 29
Expand all affected categories (33) How can this affect my environment?
Software (33 — click to show all)
Vendor: Eclipse Foundation
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: NVD/CVE catalogCorroborated: CISA Vulnrichmenthigh confidence
Vendor: Eclipse Foundation
Software Affected range: through 6.5.1.202602 inclusive Product-associated Assertion
Primary: CISA Vulnrichment — structured affected recordhigh confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: CISA Vulnrichmentmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: CISA Vulnrichmentmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
Vendor: Not identified in correlated evidence
Software Affected range: All listed or unspecified versions Product-associated Assertion
Primary: Osvmedium-high confidence
What each source says 3
European vulnerability intelligence: ENISA EUVD cross-reference: EUVD-2026-101501.
Exploit probability: Estimated exploitation probability 0.28% — percentile 19.6%.
Vulnerability summary: When a TLS 1.3 client processes a HelloRetryRequest, it copies the server's cookie into its second ClientHello without checking that the cookie fits in the outgoing packet. Both the length and the contents of that cookie come from the peer, and the write happens before certificate authentication completes, so a malicious or compromised server can overwrite memory past the caller supplied TLS packet buffer without presenting a certificate. Only the client path is affected.
OSV advisories 1
CVE-2026-103415
OSV
CVE-2026-103415 Published 2026-10-14T17:36:17.620Z Updated 2026-10-17T10:30:29.795623486Z

When a TLS 1.3 client processes a HelloRetryRequest, it copies the server's cookie into its second ClientHello without checking that the cookie fits in the outgoing packet. Both the length and the contents of that cookie come from the peer, and the write happens before certificate authentication completes, so a malicious or compromised server can overwrite memory past the caller supplied TLS packet buffer without presenting a certificate. Only the client path is affected.

OSV-CONVERSIONOSV-OUTPUT
GHSA-5PV3-RHF5-GWGQ
Related products
Read full advisory Open source at storage.googleapis.comOpen GitHub advisory or evidenceOpen GitHub advisory or evidenceOpen source at gitlab.eclipse.orgOpen GitHub advisory or evidenceOpen NVD record
Evidence coverage

Correlated from multiple vulnerability, exploitation, advisory, package and affected-product intelligence collections.

Technical query coverage · 16 collections queried · 1 CVEs correlated
2026-10-17 21:56 CESTIntelligence refreshed
1unique CVEs queried and enriched
1unique CVEs correlated to this result
1unique advisories correlated
16intelligence collections queried
Affected-product scope: The product/device count is the deduplicated set Scantide can prove from its currently ingested structured records and advisory text. It is not a claim that only those products were affected; component vulnerabilities such as Log4Shell can have a much larger downstream ecosystem. Advisory and vendor references are kept clickable so additional downstream exposure can be followed to the authoritative source.
Coverage note: Scantide correlates multiple public and locally indexed intelligence sources, but no dataset or matching process is complete. Results may omit software, dependencies, affected versions or advisories, and related records do not by themselves prove that a specific installation is vulnerable. Confirm important findings against vendor guidance and the installed product and version.