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TI-2026-30194 Aliases CVE-2026-41677GHSA-xmgf-hq76-4vx2

rust-openssl: Out-of-bounds read in PEM password callback when user callback returns an oversized length

Priority LOW 9CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
Low · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00294 22nd percentileScored 2026-11-07
Fix Fixed rust-openssl (rust-openssl): 0.10.78openssl (crates.io): 0.10.78

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
rust-opensslrust-openssl0.9.0 to before 0.10.780.10.78Patch availableCNA
—openssl (crates.io)0.9.0 to before 0.10.780.10.78Patch availableGHSA-xmgf-hq76-4vx2
  • rust-openssl Vendorrust-openssl Affected 0.9.0 to before 0.10.78 Fixed in 0.10.78 Patch available CNA
  • openssl (crates.io) Vendor— Affected 0.9.0 to before 0.10.78 Fixed in 0.10.78 Patch available GHSA-xmgf-hq76-4vx2

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:rust-openssl_project:rust-openssl:*:*:*:*:*:rust:*:*0.9.0 to before 0.10.78Vulnerablerust-openssl
  • cpe:2.3:a:rust-openssl_project:rust-openssl:*:*:*:*:*:rust:*:* Versions 0.9.0 to before 0.10.78 Vulnerable ·rust-openssl

Remediation

  • Fix · CNA rust-openssl (rust-openssl) Fixed in 0.10.78
  • Fix · GHSA-xmgf-hq76-4vx2 openssl (crates.io) Fixed in 0.10.78 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-41677
  2. 2026-10-03 Alias added: GHSA-xmgf-hq76-4vx2

References

Advisory 2

Other 4

  • TI-2018-14959 An issue was discovered in the openssl crate before 0.10.9 for Rust. CVSS 3.0CRITICAL 9.8
  • TI-2026-30198 rust-openssl: MdCtxRef::digest_final() writes past caller buffer with no length check CVSS 4.0HIGH 8.1
  • TI-2026-30193 rust-openssl: Deriver::derive and PkeyCtxRef::derive can overflow short buffers on OpenSSL 1.1.1 CVSS 4.0HIGH 7.2
  • TI-2016-08969 An issue was discovered in the openssl crate before 0.9.0 for Rust. CVSS 3.0HIGH 8.1
  • TI-2026-30300 rust-openssl: Unchecked callback-returned length in PSK and cookie generate trampolines… CVSS 4.0HIGH 8.3
  • TI-2026-30195 rust-openssl: Incorrect bounds assertion in aes key wrap CVSS 4.0HIGH 7.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences