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CVE-2026-45784: rust-openssl: Potential out-of-bounds write in `CipherCtxRef::cipher_update_inplace` for AES-KW-PAD ciphers

unknownCVE-2026-45784

CSIRTS triage

vendor: rust-opensslproduct: rust-opensslOther
What
A potential out-of-bounds write vulnerability has been identified in the CipherCtxRef::cipher_update_inplace function for AES-KW-PAD ciphers.
Who is affected
Users of rust-openssl are at risk of this vulnerability.
Urgency
Remediation is recommended as the severity is currently unknown.
Action
Update rust-openssl to the latest version to address this vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
unknown
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45784

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-45784coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for rust-openssl

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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