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CVE-2026-8796— Sereal::Decoder versions before 5.005 for Perl allow heap out-of-bounds read via crafted input

Quick assessment

Affected
YVES Sereal::Decoder
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Sereal::Decoder是YVES个人开发者的一个用于解析高性能二进制序列化数据格式的解码模块。 Sereal::Decoder 5.005之前版本存在安全漏洞，该漏洞源于处理COPY标签时堆越界读取，可能导致通过特制输入触发。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.40% · P34

Affected Version Matrix 1

VendorProduct Version RangeStatus
YVES Sereal::Decoder < 5.005 affected
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I. Basic Information for CVE-2026-8796

Vulnerability Information
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Vulnerability Title
Sereal::Decoder versions before 5.005 for Perl allow heap out-of-bounds read via crafted input
Source: CVE Program / CVE List V5
Vulnerability Description
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-decodes as a fresh tag. When that target byte matches the SHORT_BINARY pattern (an inline string whose length is encoded in the low bits of the tag), the resulting read is not bounded to precede the COPY tag's own offset and can run past the end of the input buffer. An attacker controlled COPY offset can land inside a previously decoded value rather than on a tag boundary, planting a byte that the decoder reads as a SHORT_BINARY tag and consuming up to 31 following bytes from the heap as a class name (OBJECT path) or hash key (HASH path).
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Sereal::Decoder 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Sereal::Decoder是YVES个人开发者的一个用于解析高性能二进制序列化数据格式的解码模块。 Sereal::Decoder 5.005之前版本存在安全漏洞，该漏洞源于处理COPY标签时堆越界读取，可能导致通过特制输入触发。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
YVES Sereal::Decoder 0 ~ 5.005 -

II. Public POCs for CVE-2026-8796

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III. Intelligence Information for CVE-2026-8796

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Patches & Fixes for CVE-2026-8796 (1)

Other References for CVE-2026-8796 (1)

IV. Related Vulnerabilities

Same product: Sereal::Decoder
Same vendor: YVES
Same weakness: CWE-125