5.5

CVE-2026-3229: Integer Overflow in Certificate Chain Allocation

Analyzed
AliasesUBUNTU-CVE-2026-3229DEBIAN-CVE-2026-3229ALPINE-CVE-2026-3229
Published 19-03-2026Last modified 20-03-2026

Vulnerability summary

CVE-2026-3229 is a medium (CVSS 5.5) Heap-based Buffer Overflow vulnerability in wofssl wolfssl. EPSS estimates a 0.07% chance of exploitation in the next 30 days, higher than 0% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 1.2, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.07%
0%100%
Low · -0.02 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 19-03-2026
    PublishedVulnerability first disclosed.
  2. 20-03-2026
    Last modifiedVulnerability information updated.

Description

An integer overflow vulnerability existed in the static function wolfssl_add_to_chain, that caused heap corruption when certificate data was written out of bounds of an insufficiently sized certificate buffer. wolfssl_add_to_chain is called by these API: wolfSSL_CTX_add_extra_chain_cert, wolfSSL_CTX_add1_chain_cert, wolfSSL_add0_chain_cert. These API are enabled for 3rd party compatibility features: enable-opensslall, enable-opensslextra, enable-lighty, enable-stunnel, enable-nginx, enable-haproxy. This issue is not remotely exploitable, and would require that the application context loading certificates is compromised.

CVSS metrics

7 scores · 5 sources · 2 versions

EPSS trend

Probability

0.07%

Chance of exploitation in the next 30 days

Percentile

0%

Versus all other CVEs

30-day change

Decrease -0.02 pp

From 0.09% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Alpine1 product
  • wolfssl< 5.9.1-r0 | < 5.9.0-r0
Debian1 product
  • wolfsslAll versions (No fix recorded)
Ubuntu1 product
  • wolfsslAll versions (No fix recorded)
Wofssl1 product
Wolfssl1 product

5 vendors · 5 products

References

5 links