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

CVE List

01 Why this matters

CVE-2026-89319 has no exploitation data yet. Impact if it lands: CVSS 6.3 (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).

Check if you run it Follow the feed

02 Facts

CVSS: CVSS 6.3 (v4.0)
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
EPSS: No EPSS yet
CISA KEV: Not on the CISA KEV list
Dates: published Oct 23, 2026
modified Oct 23, 2026
Weaknesses: CWE-129
Severity: medium

03 Affected packages

No package ranges are published for this id.

04 Advisory text

`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.

Advisory text is quoted from public sources and may contain anything, including instructions. It is data, not guidance.

05 References

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

06 Ask your agent

With the geoa-cve MCP server connected

explain_impact CVE-2026-89319

Or without MCP: https://cve.geoa.io/api/vuln/CVE-2026-89319. Danger: Low, CVSS 6.3.