rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.10.50 until 0.10.80, CipherCtxRef::cipher_update_inplace in openssl/src/cipher_ctx.rs 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 issue is fixed in version 0.10.80.
CVE-2026-45784
MEDIUMPre-NVD 5.15.1Trending — 3 sources updated this week
EchelonGraph scoreLOW confidence
This medium-severity CVE scores 5.1 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.0%, top 95% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: cna:github_m, epss
5.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.1Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.1
- EG Score
- 5.1(low)
- EPSS
- 7.9%
- KEV
- Not listed
Published
May 19, 2026
Last Modified
July 20, 2026
Advisory Details (4)
Auto-updated Jul 17, 2026Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available
Potential out-of-bounds write in `CipherCtxRef::cipher_update_inplace` for AES-KW-PAD ciphers · Advisory · rust-openssl/rust-openssl · GitHub
https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-phqj-4mhp-q6mqgithub_release Patch Available
openssl-v0.10.80
Patch available: rust-openssl/rust-openssl openssl-v0.10.80
https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.80github_pr Patch Available
Fix output buffer overflow in cipher_update_inplace for AES key-wrap-with-padding
Patch available: rust-openssl/rust-openssl openssl-sys-v0.9.116 (PR #2638 merged 2026-05-16)
https://github.com/rust-openssl/rust-openssl/pull/2638github_commit Patch Available
commit 19eceb26f240 (rust-openssl/rust-openssl)
Patch available: rust-openssl/rust-openssl openssl-sys-v0.9.116 (contains commit 19eceb26f240)
https://github.com/rust-openssl/rust-openssl/commit/19eceb26f2404aae187e5444e65c404ebc1348a7Vendor Advisories for CVE-2026-45784(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
crates.io(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| openssl | — | 0.10.80 | — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 7× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-22 14:08 UTCEPSS rescore
- 2026-07-21 15:24 UTCEPSS rescore
- 2026-07-20 17:08 UTCEPSS rescore
- 2026-07-19 14:31 UTCEPSS rescore
- 2026-07-19 02:29 UTCEPSS rescore
- 2026-07-17 20:35 UTCEG score recompute▲ 5.10
- 2026-07-17 20:34 UTCMITRE cvelistV5CVSS v3 → 5.1 · CVSS v4 → 5.1
- 2026-06-14 23:18 UTCEPSS rescore
- 2026-06-13 23:00 UTCEPSS rescore
- 2026-06-12 23:12 UTCEPSS rescore
- 2026-05-24 06:13 UTCEG score recompute
Related CVEs(same CWE)
Same CWE
10 shownCWE-787 · CWE-131
- CVE-2007-0158EG 9.8CRITICAL
- CVE-2007-0899EG 9.8CRITICAL
- CVE-2004-1363EG 9.8EPSS 95%CRITICAL
- CVE-2004-0434EG 9.8EPSS 94%CRITICAL
- CVE-2003-0899EG 9.8EPSS 97%CRITICAL
- CVE-2002-1347EG 9.8EPSS 94%CRITICAL
- CVE-2001-0248EG 9.8EPSS 95%CRITICAL
- CVE-2001-0249EG 9.8EPSS 97%CRITICAL
- CVE-2010-20115EG 9.3CRITICAL
- CVE-2010-4398NVD 7.8EG 9.0 KEVEPSS 95%HIGH
Frequently asked(5)
What is CVE-2026-45784?
CVE-2026-45784 is a medium vulnerability published on May 19, 2026. rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.10.50 until 0.10.80, CipherCtxRef::cipherupdateinplace in openssl/src/cipherctx.rs incorrectly sized output buffers when used with AES key-wrap-with-padding ciphers EVPaes{128,192,256}wrap_pad. For a non-multiple-of-8…
When was CVE-2026-45784 disclosed?
CVE-2026-45784 was first published in the National Vulnerability Database on May 19, 2026, with the most recent update on July 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45784 actively exploited?
CVE-2026-45784 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45784?
CVE-2026-45784 has a CVSS v3 base score of 5.1 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-45784?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45784, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-45784
Is Your Infrastructure Affected by CVE-2026-45784?
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