High 8.3Published Apr 24, 2026

CVE-2026-41898rust-openssl: Unchecked callback-returned length in PSK and cookie generate trampolines can cause OpenSSL to leak adjacent memory to the network peer

Updated under an hour ago (Oct 26, 2026, 10:10 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for rust-openssl

Exploited in the last 30 days

rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.9.24 to before 0.10.78, the FFI trampolines behind SslContextBuilder::set_psk_client_callback, set_psk_server_callback, set_cookie_generate_cb, and set_stateless_cookie_generate_cb forwarded the user closure's returned usize directly to OpenSSL without checking it against the &mut [u8] that was handed to the closure. This can lead to buffer overflows and other unintended consequences. This vulnerability is fixed in 0.10.78.

CVSS: 8.3 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N
Weakness (CWE): CWE-126, CWE-130
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Apr 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

rust-openssl rust-openssl rust_openssl:rust_openssl (from the name)	from 0.9.24, < 0.10.78	CNA record
rust-openssl_project rust-openssl rust-openssl_project:rust-openssl	from 0.9.24 before 0.10.78	NVD

References

References

https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-hppc-g8h3-xhp3	x-refsource-confirm, vendor-advisory
https://github.com/rust-openssl/rust-openssl/pull/2607	x-refsource-misc, issue-tracking
https://github.com/rust-openssl/rust-openssl/commit/1d109020d98fff2fb2e45c39a373af3dff99b24c	x-refsource-misc, patch
https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.