PT-2026-82068

OneUptime's webhook target check rejects private and loopback addresses given in IPv4 form and a small set of IPv6 forms, but has no case for the IPv4-mapped IPv6 range. The webhook delivery path calls SSRFProtection.validateWebhookTargetIsSafe, and the host-literal screening inside...

CVE-2026-18664: Improper Access Control

When ranges are used for access control i.e. of the form 1.2.3.4-1.2.3.25, because NSD wrongly compares the IP address with the range on little endian systems, IPs that were meant to be allowed may be denied, and, IPs that were meant to be denied access could be allowed. An IPv4 address is compar...

CVE-2026-80350: Server-Side Request Forgery (SSRF)

OneUptime's webhook target check rejects private and loopback addresses given in IPv4 form and a small set of IPv6 forms, but has no case for the IPv4-mapped IPv6 range. The webhook delivery path calls SSRFProtection.validateWebhookTargetIsSafe, and the host-literal screening inside...

RHCOS 4 : OpenShift Container Platform 4.18.54 (RHSA-2026:57482)

The remote Red Hat Enterprise Linux CoreOS 4 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:57482 advisory. - net/url: Incorrect parsing of IPv6 host literals in net/url CVE-2026-25679 - crypto/x509: golang: golang crypto/x509: Denial of...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098989)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098989 advisory. In the Linux kernel, the following vulnerability has been resolved: net/ip6tunnel: Prevent perpetual tunnel growth Similarly to ipv4 tunnel, ipv6 version updates...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098854)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098854 advisory. In the Linux kernel, the following vulnerability has been resolved: tcp: fix potential race in tcpv6synrecvsock Code in tcpv6synrecvsock after the call to...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098748)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098748 advisory. In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: Fix MAC comparison to be constant-time To prevent timing attacks, MACs need to be...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098760)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098760 advisory. In the Linux kernel, the following vulnerability has been resolved: ipv6: use RCU in ip6output Use RCU in ip6output in order to use dstdevrcu to prevent possible UAF...

RHEL 9 : kernel-rt (RHSA-2026:59663)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:59663 advisory. The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-104543)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-104543 advisory. In the Linux kernel, the following vulnerability has been resolved: tcp: ipv6: clamp default adverting MSS to avoid GSOBYFRAGS 0xFFFF When MTU is large,...

Unity Linux 20.1050e Security Update: kernel (UTSA-2026-104531)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-104531 advisory. In the Linux kernel, the following vulnerability has been resolved: ipvs: use parsed transport offset in SCTP state lookup setsctpstate reads the SCTP chunk header...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-104604)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-104604 advisory. In the Linux kernel, the following vulnerability has been resolved: ipv6: addrconf: bail out of dadfailure when state is no longer POSTDAD addrconfdadfailure...

CVE-2026-80347: Server-Side Request Forgery (SSRF)

mcp-fetch checks a fetch target against its SSRF guard without removing the brackets that surround an IPv6 literal. isSafeUrl reads the hostname from the parsed URL, which for a literal such as http://::1/ yields the bracketed string, and then tests it with net.isIP. That call returns zero for a...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-104578)

"The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-104578 advisory. In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntrackreasm: guard macheader adjustment after IPv6 defrag nfctfrag6reasm slides...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-104607)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-104607 advisory. In the Linux kernel, the following vulnerability has been resolved: ipvs: use parsed transport offset in SCTP state lookup setsctpstate reads the SCTP chunk header...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-104613)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-104613 advisory. In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6tables: mark malformed IPv6 extension headers for hotdrop The ah, hbh and rt matche...

AlmaLinux 9 : grafana (ALSA-2026:58982)

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:58982 advisory. grafana: Grafana: Privilege escalation via dashboard overwrite CVE-2026-33377 grafana: Grafana Auth Proxy: Unauthorized access due to incorrect IPv6...

RHEL 8 : kernel (RHSA-2026:59994)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:59994 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: net: ipv6: use-after-free in...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098740)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098740 advisory. In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: Fix use-after-free when processing MLD queries When processing an MLD query, a point...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098720)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098720 advisory. In the Linux kernel, the following vulnerability has been resolved: ipvs: skip ipv6 extension headers for csum checks Protocol checksum validation fails for IPv6 if...