HOMEVULNERABILITIESCVE-2026-41677
CRITICAL

CVE-2026-41677

CWE-125Published: April 24, 2026· Updated: Apr 28, 2026

9.1
CVSS v3.1
EPSS:0.08%probability of exploitation in 30 daysPercentile:24.4th

Official Description

rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.9.0 to before 0.10.78, the *_from_pem_callback APIs did not validate the length returned by the user's callback. A password callback that returns a value larger than the buffer it was given can cause some versions of OpenSSL to over-read this buffer. OpenSSL 3.x is not affected by this. This vulnerability is fixed in 0.10.78.

NVD Source

Technical Analysis

CVE-2026-41677 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 9.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected Vendors & Products

rust-openssl_project1 product
rust-openssl
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

ADVISORYhttps://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-xmgf-hq76-4vx2

All References (1)

→
https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-xmgf-hq76-4vx2Vendor Advisory

Quick Facts

CVE IDCVE-2026-41677
CVSS Score9.1 / 10
SeverityCRITICAL
WeaknessCWE-125
CISA KEVNo
EPSS (30d)0.08%
Affected1 vendor
PublishedApr 24, 2026

Related CVEs (CWE-125)

CVE-2026-34987
9.9
CVE-2026-42799
9.8
CVE-2026-33642
9.8
CVE-2026-24213
9.8
CVE-2026-9875
9.6
CVE-2026-6920
9.6

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-41677 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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CVE-2026-41677 — CVSS 9.1 CRITICAL | CTIWATCH.COM