CVE-2026-4159Disclosure(wolfssl / wolfssl)

LOWCVSS 3.3 · LOW

Signal is active with 2 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

1-byte OOB heap read in wc_PKCS7_DecodeEnvelopedData via zero-length encrypted content. A vulnerability existed in wolfSSL 5.8.4 and earlier, where a 1-byte out-of-bounds heap read in wc_PKCS7_DecodeEnvelopedData could be triggered by a crafted CMS EnvelopedData message with zero-length encrypted content. Note that PKCS7 support is disabled by default.

wolfssl CVEs Back to dashboard

0.0/ 10 priority

Sources & remediation

Patch / fix

https://github.com/wolfSSL/wolfssl/pull/9945

Weakness type (CWE)

CWE-125

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

wolfssl

Threat summary

2 mentions across 1 observed day

What's happening

Technical details provided in 2 signals
Disclosure: 2 classified signals
2 total mentions across 1 day

Affected systems

Vendors

wolfssl

Products

wolfssl

Deep dive

Activity timeline2 mentions / 1d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

Infoflowcloud@infoflowcloud202d
Disclosure
🚨*CVE* CVE-2026-4159 1-byte OOB heap read in wc_PKCS7_DecodeEnvelopedData via zero-length encrypted content. A vulnerability existed in wolfSSL 5.8.4 and earlier, where a 1-byte out-of-boun… https://www.cve.org/CVERecord?id=CVE-2026-4159 ----- Traducción: CVE-2026-4159 Lec… http://infoflow.cloud`
Post summary
The post announces CVE‑2026‑4159, detailing a one‑byte out‑of‑bounds heap read in wolfSSL caused by zero‑length encrypted content, and links to the official CVE record. No exploit, patch, or active usage information is provided.
0000048
61 followersView on X
CVE@CVEnew202d
Disclosure
CVE-2026-4159 1-byte OOB heap read in wc_PKCS7_DecodeEnvelopedData via zero-length encrypted content. A vulnerability existed in wolfSSL 5.8.4 and earlier, where a 1-byte out-of-boun… https://www.cve.org/CVERecord?id=CVE-2026-4159
Post summary
The text reports CVE-2026-4159 as a 1‑byte OOB heap read in wolfSSL 5.8.4 and earlier, detailing the vulnerability context and affected versions.
00000251
56.8K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	wolfssl	wolfssl	-	-	-

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