Vulnerability in Rust Openssl Project (CVE-2026-41898)
Summary
Vulnerability in Rust Openssl Project (CVE-2026-41898). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 0.10.78 or later.
Original description
The description as published by the source.
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.
Source: NIST National Vulnerability Database NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-41898 has been found in Rust Openssl Project.
Risk of unauthorized operations or information disclosure. CVSS score: 5.3/10.
What to do: upgrade Rust Openssl Project to 0.10.78 or later.
If unsure, ask your IT team or search "Rust Openssl Project CVE-2026-41898" on the vendor's site.
CVE-2026-41898 (Rust Openssl Project) — CWE-126 / CVSS v3 5.3
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 0.10.78 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-126) exists in Rust Openssl Project.
Check the vendor advisory for the affected versions of Rust Openssl Project.
Severity: Medium (CVSS 5.3/10). Risk of unauthorized operations or information disclosure.
Update to 0.10.78.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Rust Openssl Project を使っているサービスとバージョンを洗い出す。
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2Apply patch patch
Upgrade Rust Openssl Project to 0.10.78ステージング環境で 0.10.78 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
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3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-41898 rust-openssl
- Ubuntu UBUNTU-CVE-2026-41898 rust-openssl