CVE-2026-5187Disclosure(wolfssl / wolfssl)

LOWCVSS 9.8 · CRITICAL

Signal is active with 1 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

Two potential heap out-of-bounds write locations existed in DecodeObjectId() in wolfcrypt/src/asn.c. First, a bounds check only validates one available slot before writing two OID arc values (out[0] and out[1]), enabling a 2-byte out-of-bounds write when outSz equals 1. Second, multiple callers pass sizeof(decOid) (64 bytes on 64-bit platforms) instead of the element count MAX_OID_SZ (32), causing the function to accept crafted OIDs with 33 or more arcs that write past the end of the allocated buffer.

wolfssl CVEs Back to dashboard

0.0/ 10 priority

Sources & remediation

Other references

https://github.com/wolfSSL/wolfssl

Weakness type (CWE)

CWE-122CWE-787

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

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 2 observed days
Momentum state: stable

What's happening

Technical details provided in 2 signals
Disclosure: 2 classified signals
Peaked 1d ago at 1 mentions (2026-04-09); latest day: 1
2 total mentions across 2 days

Affected systems

Vendors

wolfssl

Products

wolfssl

Deep dive

Activity timeline2 mentions / 2d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets3 URLs

By indicator

Full discourse2 posts

Vulmon Vulnerability Feed@VulmonFeeds177d
Disclosure
CVE-2026-5187 Heap Out-of-Bounds Write in wolfSSL DecodeObjectId Function https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-5187 Vulnerability Alert Subscriptions: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=1
Post summary
A brief alert announcing CVE-2026-5187, a heap out-of-bounds write vulnerability in wolfSSL's DecodeObjectId function, with no additional exploit, patch, or PoC details provided.
0000052
4.0K followersView on X
CVE@CVEnew182d
Disclosure
CVE-2026-5187 Two potential heap out-of-bounds write locations existed in DecodeObjectId() in wolfcrypt/src/asn.c. First, a bounds check only validates one available slot before writ… https://www.cve.org/CVERecord?id=CVE-2026-5187
Post summary
The post announces that CVE-2026-5187 involves two heap out-of-bounds write bugs in DecodeObjectId() of wolfcrypt/src/asn.c, providing technical detail but no PoC, exploit, patch, or evidence of active exploitation.
0000091
57.0K 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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