TI-2026-74355 Aliases CVE-2026-103414

Out-of-bounds write in Eclipse GUIX binary resource loader

LOW 38CWE-787Published 2026-10-14 · Updated 2026-10-16

Key facts

Attack vector: Local
Privileges required: None
User interaction: Active
Attack complexity: Low
Attack requirements: None
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

Eclipse Foundation GUIX through 6.5.1.202602a is affected. The binary resource theme loader sizes its memory arena and fills it in two passes that read page headers independently, so the two passes can derive different glyph counts and the load writes past the end of the arena (CWE-787). A local attacker with no privileges can trigger it when a user loads a crafted binary resource file, and the flaw is present in the default configuration.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

The GUIX binary resource (theme) loader sizes its arena and populates it in two separate passes that traverse the resource file with independent cursor arithmetic. Because `gx_page_header_data_size` is never validated against the glyph data a page actually contains, the two passes can read different page headers for the same font page, derive different glyph counts, and reserve less than the load pass writes. The excess is written past the end of the arena, with content taken verbatim from the file. The overflowed buffer is allocated by GUIX itself, through `_gx_system_memory_allocator`, rather than supplied by the caller. The public API `gx_binres_theme_load()` takes no size parameter, so no amount of caller diligence prevents this. Reproduces in the shipped default configuration; `GX_BINARY_RESOURCE_SUPPORT` is enabled by default.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0016 5th percentileScored 2026-11-07

Fix Fixed GUIX (Eclipse Foundation): 6.5.2.202603

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Eclipse Foundation	GUIX	up to 6.5.1.202602a	6.5.2.202603	Patch available	CNA

GUIX VendorEclipse Foundation Affected up to 6.5.1.202602a Fixed in 6.5.2.202603 Patch available CNA

Remediation

Update Eclipse Foundation GUIX to 6.5.2.202603, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Fix · CNA GUIX (Eclipse Foundation) Fixed in 6.5.2.202603

Timeline

2026-10-15 Threatist record created from CVE-2026-103414
2026-10-16 Priority changed: MEDIUM → LOW
2026-10-18 CISA SSVC decision points changed

References

Other 2

TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
TI-2026-81947 Unauthenticated command injection in Eclipse Che che-machine-exec CVSS 3.1CRITICAL 9.8
TI-2026-13216 CWE-863: ABAC authorization bypass via trailing slash route normalization in Eclipse BaSyx Go Components CVSS 3.1CRITICAL 9.8
TI-2026-06514 Path traversal in Eclipse BaSyx CVSS 3.1CRITICAL 10.0
TI-2026-01382 In the Eclipse Theia Website repository, the GitHub Actions workflow… CVSS 3.1CRITICAL 10.0
TI-2026-74697 Authentication bypass in Eclipse Jetty EthereumAuthenticator CVSS 4.0CRITICAL 9.3

See all 466 →

Sources

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