Possible NULL Dereference When Processing CMS KeyTransportRecipientInfo

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-28390
StatePUBLISHED
Assigneropenssl
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-07 22:16:21 UTC
Updated2026-04-08 21:27:00 UTC
DescriptionIssue summary: During processing of a crafted CMS EnvelopedData message with KeyTransportRecipientInfo a NULL pointer dereference can happen. Impact summary: Applications that process attacker-controlled CMS data may crash before authentication or cryptographic operations occur resulting in Denial of Service. When a CMS EnvelopedData message that uses KeyTransportRecipientInfo with RSA-OAEP encryption is processed, the optional parameters field of RSA-OAEP SourceFunc algorithm identifier is examined without checking for its presence. This results in a NULL pointer dereference if the field is missing. Applications and services that call CMS_decrypt() on untrusted input (e.g., S/MIME processing or CMS-based protocols) are vulnerable. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.

Risk And Classification

EPSS: 0.000290000 probability, percentile 0.084220000 (date 2026-04-09)

Problem Types: CWE-476 | CWE-476 CWE-476 NULL Pointer Dereference

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OpenSSL OpenSSL affected 3.6.0 3.6.2 semver Not specified
CNA OpenSSL OpenSSL affected 3.5.0 3.5.6 semver Not specified
CNA OpenSSL OpenSSL affected 3.4.0 3.4.5 semver Not specified
CNA OpenSSL OpenSSL affected 3.3.0 3.3.7 semver Not specified
CNA OpenSSL OpenSSL affected 3.0.0 3.0.20 semver Not specified
CNA OpenSSL OpenSSL affected 1.1.1 1.1.1zg custom Not specified
CNA OpenSSL OpenSSL affected 1.0.2 1.0.2zp custom Not specified

References

ReferenceSourceLinkTags
openssl-library.org/news/secadv/20260407.txt [email protected] openssl-library.org
github.com/openssl/openssl/commit/01194a8f1941115cd0383bfa91c736dd3993c8bc [email protected] github.com
github.com/openssl/openssl/commit/fd2f1a6cf53b9ceeca723a001aa4b825d7c7ee75 [email protected] github.com
github.com/openssl/openssl/commit/2e39b7a6993be445fddb9fbce316fa756e0397b6 [email protected] github.com
github.com/openssl/openssl/commit/af2a5fecd3e71a29e7568f9c1453dec5cebbaff4 [email protected] github.com
github.com/openssl/openssl/commit/ea7b4ea4f9f853521ba34830cbcadc970d2e0788 [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Muhammad Daffa (en)

CNA: Zhanpeng Liu (Tencent Xuanwu Lab) (en)

CNA: Guannan Wang (Tencent Xuanwu Lab) (en)

CNA: Guancheng Li (Tencent Xuanwu Lab) (en)

CNA: Joshua Rogers (en)

CNA: Chanho Kim (en)

CNA: Neil Horman (en)

© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report