What is CVE-2026-8796?

CVE-2026-8796 is a high-severity vulnerability in Yves Sereal::decoder, classified under Out-of-bounds Read. CVSS score: 8.1/10. Published 2026-05-31.

How severe is CVE-2026-8796?

High severity. CVSS v3 base score is 8.1 out of 10.

Out-of-bounds Read in Yves Sereal::decoder

CVE-2026-8796

Sereal::Decoder versions before 5.005 for Perl allow heap out-of-bounds read via crafted input. In Perl/Decoder/srl_decoder.c, srl_read_object() and srl_read_hash() process a COPY tag, a back-reference whose target byte the decoder re-dec…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (2.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H.

Affected products

Yves Sereal::decoder — versions 0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

9b29abf9-4ab0-4765-b253-1875cd9b441e (patch)
9b29abf9-4ab0-4765-b253-1875cd9b441e (release-notes)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-8796?: CVE-2026-8796 is a high-severity vulnerability in Yves Sereal::decoder, classified under Out-of-bounds Read. CVSS score: 8.1/10. Published 2026-05-31.
How severe is CVE-2026-8796?: High severity. CVSS v3 base score is 8.1 out of 10.