CVE-2026-89319

JweDirectDecryptorBlock.Decrypt: unchecked _thales_aad length header reachable with forged tag → index-out-of-range / slice-bounds panic and unbounded allocation

State: Published
Severity: 6.3 Medium
Published: Oct 23, 2026
Updated: Oct 23, 2026
Reserved: Sep 11, 2026

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Description

`JweDirectDecryptorBlock.Decrypt` read a 64-bit plaintext length from the `_thales_aad` protected-header field and used it without any validation. A truncated field panics `binary.BigEndian.Uint64`, an oversized value drives an unbounded allocation, and a value larger than the decrypted block panics with a slice-bounds error.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	eclipse

Weaknesses

CWE-129 Improper Validation of Array Index

Affected Products

Product	Versions
Eclipse KeyPont - GOSEEclipse Foundation	0.9.0 through 0.13.0-rc1Affected
Eclipse KeyPont - GOSEEclipse Foundation	before 1.0.0-rc1Affected

References

https://github.com/eclipse-keypont/gose/security/advisories/GHSA-4gj8-hg2r-gw6q

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