How severe is CVE-2026-41681?

CVE-2026-41681 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-41681 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41681?

CVE-2026-41681 affects Rust-openssl Project Rust-openssl. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-41681?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-41681 have an EU (EUVD) identifier?

Yes. CVE-2026-41681 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25586.

When was CVE-2026-41681 published?

CVE-2026-41681 was published on 2026-04-24 and last updated on 2026-06-17.

CVE-2026-41681

CVE-2026-41681 is a critical-severity vulnerability in Rust-openssl Project Rust-openssl with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-121.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 8.1
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25586
Weakness: CWE-121
Affected product: Rust-openssl Project Rust-openssl
Published: 2026-04-24
Last modified: 2026-06-17

Description

rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.10.39 to before 0.10.78, EVP_DigestFinal() always writes EVP_MD_CTX_size(ctx) to the out buffer. If out is smaller than that, MdCtxRef::digest_final() writes past its end, usually corrupting the stack. This is reachable from safe Rust. This vulnerability is fixed in 0.10.78.

Frequently asked questions

What is CVE-2026-41681?: rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.10.39 to before 0.10.78, EVP_DigestFinal() always writes EVP_MD_CTX_size(ctx) to the out buffer. If out is smaller than that, MdCtxRef::digest_final() writes past its end, usually corrupting the stack. This is reachable from safe Rust. This vulnerability is fixed in 0.10.78.
How severe is CVE-2026-41681?: CVE-2026-41681 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-41681 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-41681?: CVE-2026-41681 affects Rust-openssl Project Rust-openssl. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-41681?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-41681 have an EU (EUVD) identifier?: Yes. CVE-2026-41681 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25586.
When was CVE-2026-41681 published?: CVE-2026-41681 was published on 2026-04-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:rust-openssl_project:rust-openssl:*:*:*:*:*:rust:*:*

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