CVE-2026-115942: Apache Qpid Proton C: Verifying non compliant TLS wildcard cert can cause stack buffer overflow read
CVE-2026-115942 key facts
- CISA KEV
- Not listed (catalogue checked )
- Highest advisory rating
- Medium
- CVSS base score
- 5.9 (Red Hat)
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N· base score 7.5, scored by CISA-ADPAttack vector: network. Attack complexity: low. Privileges required: none. User interaction: none. Scope: unchanged. Confidentiality impact: high. Integrity impact: none. Availability impact: none.- Weakness
- CWE-125 Out-of-bounds read
- CISA SSVC
- Exploitation: none observed. Automatable: yes. Technical impact: partial. CISA, .
- Fixed releases
- Apache: 0.41.1
- Red Hat: 0.41.1
- Assigned by
- apache (CNA)
- CVE record published
- Listed by VulniPulse
- Record changed
Ratings, versions and fixes are quoted from the vendor advisories that cover only CVE-2026-115942; each belongs to its advisory, not to every product listed. How records are collected and checked.
Description
A misconfigured wildcard TLS certificate causes a stack read overflow. This issue does not affect any wildcard certificate issued to the RFC9525 standard - the fix only accepts certificates that comply to this standard. This issue affects Apache Qpid Proton C: through 0.40.0. Users are recommended to upgrade to version 0.41.1, which fixes the issue.
Text from the CVE.org record (apache).
How do I fix CVE-2026-115942?
Upgrade to a fixed release named by the vendor:
- Apache: 0.41.1
- Red Hat: 0.41.1
- Users are recommended to upgrade to version 0.41.1, which fixes the issue. (Apache)
Vendor advisories for CVE-2026-115942
Apache
1 advisory- Advisory severityUnrated
Advisory [CVE-2026-115942] Apache Qpid Proton C: Verifying non compliant TLS wildcard cert can cause stack buffer overflow read
CVE-2026-115942Source published Source updated
A misconfigured wildcard TLS certificate causes a stack read overflow. This issue does not affect any wildcard certificate issued to the RFC9525 standard - the fix only accepts certificates that comply to this standard. This issue affects Apache Qpid Proton C: through 0.40.0. Users are recommended to upgrade to version 0.41.1, which fixes the issue.
- Affected products in this advisory
- Apache Qpid Proton
- Source-reported affected versions
- Apache Qpid Proton C through 0.40.0
- Source-reported fixed versions
- 0.41.1
- Mitigation guidance
- Users are recommended to upgrade to version 0.41.1, which fixes the issue.
Red Hat
1 advisory- Advisory severityMedium5.9
Medium [CVE-2026-115942] Denial of Service via misconfigured wildcard TLS certificate
CVE-2026-115942Source published Source updated
Denial of Service via misconfigured wildcard TLS certificate. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-125.
- Related products — impact not confirmed
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- 0.40.0
- Source-reported fixed versions
- 0.41.1
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
References
Timeline
- CVE record published
- First vendor advisory listed by VulniPulse
- CVE record last updated
More Apache advisories
CVE-2026-114230Oct 29, 2026Apache Qpid Proton C: Potential authentication bypass: regular AMQP framesCVE-2026-105042Oct 29, 2026Apache Qpid Proton C: Unbounded recursion in parsing AMQP message bodies can lead to crashCVE-2026-105031Oct 29, 2026Apache Qpid Proton C: The OpenSSL TLS implementation adds a locally trusted certificateCVE-2026-86336Nov 10, 2026Apache TomEE running on JDK 21 or later skips EJB method authorization checksCVE-2026-86531Nov 10, 2026The embedded OpenEJB HTTP server does not limit the size of incoming request bodiesCVE-2026-87758Nov 10, 2026The remote EJB client does not verify
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