🛡️ GHSA-wwq9-3cpr-mm53 — hashbrown

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-502 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Borsh serialization of HashMap is non-canonical

The borsh serialization of the HashMap did not follow the borsh specification. It potentially produced non-canonical encodings dependent on insertion order. It also did not perform canonicty checks on decoding.

This can result in consensus splits and cause equivalent objects to be considered distinct.

This was patched in 0.15.1.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

GHSA-wwq9-3cpr-mm53 is classified as CWE-502: Deserialization of Untrusted Data. Serialised data from an untrusted source is reconstructed into objects, which can trigger code during the process.

Affected software

GHSA-wwq9-3cpr-mm53 is recorded against 1 package.

  • hashbrown

Timeline and source

Published on 4 December 2024 and last revised on 4 February 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

github.com (Web)
github.com (Web)
github.com (Package)
rustsec.org (Web)

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
CWE CWE-502
Public Exploit ✅ No
Source OSV
Published 2024-12-04
Updated 2026-08-12
Modified 2026-02-04
Fix URL N/A

Affected Packages

Software From version Fixed in
hashbrown — —

Similar Threats

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