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NVD Vulnerability Details :
CVE-2026-34183
Awaiting Analysis
More InfoOfficial Page
Source-openssl-security@openssl.org
View Known Exploited Vulnerability (KEV) details
Published At-09 Jun, 2026 | 17:17
Updated At-10 Jun, 2026 | 16:17

Issue summary: Remote peer may exhaust heap memory of the QUIC server or client by flooding it with packets containing PATH_CHALLENGE frames. Impact summary: A malicious remote peer can cause an unbounded memory allocation which can lead to an abnormal termination of the application acting as a QUIC client or server and a Denial of Service. A remote peer may exhaust heap memory by flooding the local QUIC stack with PATH_CHALLENGE frames. The local QUIC stack allocates a PATH_RESPONSE frame for every PATH_CHALLENGE it receives. The allocated PATH_RESPONSE frame gets freed only when the remote peer acknowledges reception of the PATH_RESPONSE frame which will not be done by a malicious peer. The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue. The QUIC stack is outside of OpenSSL FIPS module boundary.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: Secondary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-1325Secondaryopenssl-security@openssl.org
CWE ID: CWE-1325
Type: Secondary
Source: openssl-security@openssl.org
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/openssl/openssl/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517openssl-security@openssl.org
N/A
https://github.com/openssl/openssl/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9acopenssl-security@openssl.org
N/A
https://github.com/openssl/openssl/commit/d2e9efbe4900a373227deb136e8665401404ffacopenssl-security@openssl.org
N/A
https://github.com/openssl/openssl/commit/fbaa83859c01ad64f497b757aaf51be7d05ed9ebopenssl-security@openssl.org
N/A
https://openssl-library.org/news/secadv/20260609.txtopenssl-security@openssl.org
N/A
Hyperlink: https://github.com/openssl/openssl/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517
Source: openssl-security@openssl.org
Resource: N/A
Hyperlink: https://github.com/openssl/openssl/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9ac
Source: openssl-security@openssl.org
Resource: N/A
Hyperlink: https://github.com/openssl/openssl/commit/d2e9efbe4900a373227deb136e8665401404ffac
Source: openssl-security@openssl.org
Resource: N/A
Hyperlink: https://github.com/openssl/openssl/commit/fbaa83859c01ad64f497b757aaf51be7d05ed9eb
Source: openssl-security@openssl.org
Resource: N/A
Hyperlink: https://openssl-library.org/news/secadv/20260609.txt
Source: openssl-security@openssl.org
Resource: N/A
Change History
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