CVE-2026-8796— Sereal::Decoder 安全漏洞

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

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).

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跨界内存读

Sereal::Decoder 安全漏洞

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。

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