CVE-2026-87825
zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free of Compression and Decompression Dictionaries
CVSS Score
7.7
EPSS Score
0.0%
EPSS Percentile
0th
zstd-jni before 1.5.7-14 contains a use-after-free vulnerability where streams and contexts hold a dictionary's shared lock only during the load call, allowing the dictionary to be closed while still referenced. Attackers can close a dictionary after associating it with a stream or context, causing subsequent read or write operations to access freed native memory, resulting in silent data corruption or JVM crashes.
| CWE | CWE-416 |
| Vendor | luben |
| Product | zstd-jni |
| Published | Sep 9, 2026 |
| Last Updated | Sep 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High
Affected Versions
luben / zstd-jni
1.3.8-4 < 1.5.7-14
References
github.com: https://github.com/luben/zstd-jni/security/advisories/GHSA-947w-pxjj-c7m9 github.com: https://github.com/luben/zstd-jni/commit/393d7311766abbc285b149302c0fe1f94b16d555 github.com: https://github.com/luben/zstd-jni/commit/a560131d7834598afd9cea6b7c107bc88e915936 github.com: https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/ZstdInputStreamNoFinalizer.java github.com: https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/BaseZstdBufferDecompressingStreamNoFinalizer.java github.com: https://github.com/luben/zstd-jni/releases/tag/v1.5.7-14 github.com: https://github.com/luben/zstd-jni/commit/0827ed02551bbd8d6f8e4bbff99d83bf50f91938 github.com: https://github.com/luben/zstd-jni vulncheck.com: https://www.vulncheck.com/advisories/zstd-jni-1.3.8-4-through-1.5.7-13-use-after-free-of-compression-and-decompression-dictionaries
Credits
Yu Bao, PayPal Cyber Security Team