CVE-2026-39892
criticalpriority · track · 39EPSS 0.008 · 55 %ileDEEUFRNLUSEPSS · scored 2026-10-23
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 45.0.0 to before 46.0.7, if a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. Hash.update()), this could lead to buffer overflows. This vulnerability is fixed in 46.0.7.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–critical · 2.7–9.8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (35)
Products and version ranges known to be affected.
advisories (11)
Vendor and ecosystem advisories describing this.
- NCSC-2026-0256Kwetsbaarheden verholpen in Oracle CommunicationsNL2026-07-22csaf · ncsc_nlNL
Oracle heeft kwetsbaarheden verholpen in Communications producten en onderliggende third party software. Het betreft een totaal van 213 kwetsbaarheden, waarvan 67 zich bevinden in Oracle producten en 146 in third-party producten waar eerder updates voor zijn verschenen en welke in deze Oracle updates zijn verwerkt.
- NCSC-2026-0259Kwetsbaarheden verholpen in Oracle AnalyticsNL2026-07-22csaf · ncsc_nlNL
Oracle heeft meerdere kwetsbaarheden verholpen in Oracle BI Publisher (versies 8.2.0.0.0, 12.2.1.4.0 en 26.01.0.0.0) en Oracle Business Intelligence Enterprise Edition (versies 8.2.0.0.0 en 26.01.0.0.0).
- NCSC-2026-0444Kwetsbaarheden verholpen in Oracle CommunicationsNL2026-10-21csaf · ncsc_nlNL
Oracle heeft 110 kwetsbaarheden verholpen in diverse Oracle Communications-producten, waaronder Oracle Communications Unified Assurance, Oracle Communications Cloud Native Core Security Edge Protection Proxy, Oracle Communications Service Catalog and Design en Oracle Communications Operations Monitor.
- WID-SEC-W-2026-1434IBM App Connect Enterprise Certified Container: Mehrere SchwachstellenDeutsch2026-05-07csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in IBM App Connect Enterprise Certified Container ausnutzen, um beliebigen Programmcode auszuführen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand zu verursachen oder Cross-Site-Scripting-Angriffe durchzuführen.
- WID-SEC-W-2026-2437Oracle Communications: Mehrere SchwachstellenDeutsch2026-07-21csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle Communications ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.
- WID-SEC-W-2026-3046IBM Concert: Mehrere SchwachstellenDeutsch2026-08-26csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in IBM Concert ausnutzen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen, um einen SQL-Injection Angriff durchzuführen und um Sicherheitsvorkehrungen zu umgehen.
- WID-SEC-W-2026-4090Oracle Communications: Mehrere SchwachstellenDeutsch2026-10-20csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle Communications ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.
- GHSA-p423-j2cm-9vmqCryptography vulnerable to buffer overflow if non-contiguous buffers were passed to APIs2026-04-08ghsa · osvUS
If a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. `Hash.update()`), this could lead to buffer overflows. For example: ```python h = Hash(SHA256()) b.update(buf[::-1]) ``` would read past the end of the buffer on Python >3.11
- CERTFR-2026-AVI-1366Multiples vulnérabilités dans les produits SplunkFrançais2026-10-22vendor · certfrFR
- CERTFR-2026-AVI-1378Multiples vulnérabilités dans les produits IBMFrançais2026-10-23vendor · certfrFR
- PYSEC-2026-362026-04-08vendor · osvUS
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 45.0.0 to before 46.0.7, if a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. Hash.update()), this could lead to buffer overflows. This vulnerability is fixed in 46.0.7.
also known as (6)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (34)
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2026/04/08/12cnnvd
- https://github.com/pyca/cryptographyPatchcnnvd
- https://github.com/pyca/cryptography/security/advisories/GHSA-p423-j2cm-9vmqcnnvd
- https://github.com/pyca/cryptography/security/advisories/GHSA-p423-j2cm-9vmqenisa_euvd
- http://www.openwall.com/lists/oss-security/2026/04/08/12Mailing ListRelease NotesThird Party Advisorynvd
- https://access.redhat.com/errata/RHSA-2026:19375nvd
- https://access.redhat.com/errata/RHSA-2026:20338nvd
- https://access.redhat.com/errata/RHSA-2026:21017nvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan