Vulnerability in openssl (CVE-2026-45784)
Summary
Vulnerability in openssl (CVE-2026-45784). Data can be tampered with by attackers. Mitigation: upgrade to 0.10.80 or later.
Original description
The description as published by the source.
CipherCtxRef::cipher_update_inplace incorrectly sized output buffers when used with AES key-wrap-with-padding ciphers (EVP_aes_{128,192,256}_wrap_pad). For a non-multiple-of-8 input, OpenSSL writes up to 7 bytes past the end of the caller's buffer or Vec, producing attacker-controllable heap corruption when the plaintext length is attacker-influenced.
This only impacts users using AES key-wrap-with-padding ciphers.
This method was missed in the fix for GHSA-xv59-967r-8726
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
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-2026-45784 has been found in openssl.
Data can be tampered with by attackers. CVSS score: 7.1/10.
What to do: upgrade openssl to 0.10.80 or later.
If unsure, ask your IT team or search "openssl CVE-2026-45784" on the vendor's site.
CVE-2026-45784 (openssl) — CWE-131 / CVSS v3 7.1
Attack vector: local / no user interaction
Patched: 0.10.80 — 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-131) exists in openssl.
Check the vendor advisory for the affected versions of openssl.
Severity: High (CVSS 7.1/10). Data can be tampered with by attackers.
Update to 0.10.80.
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. Run grep -r 'openssl' . against your dependency files (package-lock.json, requirements.txt, go.sum) 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
grep -r 'openssl' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
opensslを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade openssl to 0.10.80ステージング環境で 0.10.80 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。
-
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。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-45784 rust-openssl
- Ubuntu UBUNTU-CVE-2026-45784 rust-openssl
References
- package github.com
- patch security-advisories@github.com
- patch security-advisories@github.com
- patch security-advisories@github.com
- web github.com
- web security-advisories@github.com