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CVE-2026-55961

wolfSSL_PKCS7_verify() reports success for degenerate (certs-only) PKCS#7 with no signer

HIGH
7.5
CVSS Score
Published: June 25, 2026 at 04:51 PM UTC
Updated: June 27, 2026 at 11:42 AM UTC
1 product affected across 1 vendorwolfSSL

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Severity
HIGH7.5
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

wolfSSL_PKCS7_verify() returning success for a degenerate (certs-only) PKCS#7 object that contains no signer. Such an object has empty signerInfos, so the underlying signed-data verification succeeds without authenticating any content. The compatibility-layer verify path now rejects the object when no signer signature has actually been verified, so a PKCS#7 carrying no valid signature is no longer reported as verified. This is enforced regardless of the PKCS7_NOVERIFY flag, which only suppresses signer certificate chain validation and was never intended to waive the requirement that a signature exist. Only affects OpenSSL compatibility builds that call the PKCS7_verify() compatibility API on potentially degenerate PKCS#7 bundles.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

wolfSSL· Wolfssl
95%
3.15.7 ≤ v ≤ 5.9.13.15.7
Affected range stops below 5.9.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

PatchIssue Tracking
Source: cverecord
https://github.com/wolfSSL/wolfssl/pull/10702
Vendor Advisory
Source: cverecord
https://www.wolfssl.com/docs/security-vulnerabilities/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-347

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