PT-2026-59646

Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This requires parsing the /ToUnicode entry of a font with unusually large values, for example during text extraction. Patches This has been fixed in pypdf==6.7.1. Workarounds ...

Alibaba Cloud Linux 3 : 0190: git-lfs (ALINUX3-SA-2026:0190)

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by a vulnerability as referenced in the ALINUX3-SA-2026:0190 advisory. Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities: CVE-2026-39821: The ToASCII and ToUnicode functions...

golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing

A flaw was found in golang.org/x/net/idna. ToASCII and ToUnicode incorrectly accept Punycode-encoded labels that decode to an ASCII-only hostname for example, xn--example-.com returns example.com instead of an error. Applications that validate the ASCII form then convert to Unicode may grant acce...

Oracle Linux 9 : git-lfs (ELSA-2026-30854)

The remote Oracle Linux 9 host has a package installed that is affected by a vulnerability as referenced in the ELSA-2026-30854 advisory. - Fix CVE-2026-39821: vendored golang.org/x/net/idna ToUnicode incorrectly accepting all-ASCII xn-- labels Tenable has extracted the preceding description bloc...

git-lfs security update

3.7.1-4.1 - Fix CVE-2026-39821: vendored golang.org/x/net/idna ToUnicode incorrectly accepting all-ASCII xn-- labels - Resolves: RHEL-183797...

CVE-2026-57053

GNU libidn before 1.44 is prone to out-of-bounds reads of uninitialized memory in the ToUnicode APIs because of mishandling in idnatounicodeinternal. The affected code is not present in libidn2...

CVE-2026-57053

GNU libidn before 1.44 is prone to out-of-bounds reads of uninitialized memory in the ToUnicode APIs because of mishandling in idnatounicodeinternal. The affected code is not present in libidn2...

CVE-2026-57053

GNU libidn before 1.44 is prone to out-of-bounds reads of uninitialized memory in the ToUnicode APIs because of mishandling in idnatounicodeinternal. The affected code is not present in libidn2...

CVE-2026-57053

CVE-2026-57053 affects GNU libidn before 1.44, with out-of-bounds reads of uninitialized memory in the ToUnicode APIs due to mishandling in idna_to_unicode_internal; the vulnerable code is not present in libidn2. The CVSSv3.1 base score is 4.0 (Medium), with LOCAL attack vector, HIGH complexity, ...

CVE-2026-57053: Improper Validation of Specified Quantity in Input

GNU libidn before 1.44 is prone to out-of-bounds reads of uninitialized memory in the ToUnicode APIs because of mishandling in idnatounicodeinternal. The affected code is not present in libidn2...

PT-2026-51573

Name of the Vulnerable Software and Affected Versions GNU libidn versions prior to 1.44 Description An issue exists in the ToUnicode APIs due to mishandling in the idna to unicode internal function, which can lead to out-of-bounds reads of uninitialized memory. Recommendations Update to version...

Amazon Linux 2023 : containerd, containerd-stress (ALAS2023-2026-1847)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1847 advisory. Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service. CVE-2026-25680 Parsing arbitrary HTML which is then rendered using Render can result in an...

[slackware-security] libidn

New libidn packages are available for Slackware 15.0 and -current to fix security issues. Here are the details from the Slackware 15.0 ChangeLog: patches/packages/libidn-1.44-i586-1-slack15.0.txz: Rebuilt. This update fixes security issues: libidn: Fix read-out-of-bounds error in ToUnicode APIs...

CLEANSTART-2026-VN16911 ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label

Multiple security vulnerabilities affect the wave package. The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. See references for individual vulnerability details...

SUSE CVE-2026-39821

The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode"xn--example-.com" incorrectly returns the name "example.com" rather than an error. This behavior can lead to privilege escalation in programs using the idna...

Improper Authentication

Overview Affected versions of this package are vulnerable to Improper Authentication via the ToASCII and ToUnicode functions. An attacker can bypass hostname validation by submitting Punycode-encoded labels that decode to ASCII-only labels, potentially leading to privilege escalation in...

AZL-87393 CVE-2026-39821 affecting package cert-manager for versions less than 1.12.15-9

The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode"xn--example-.com" incorrectly returns the name "example.com" rather than an error. This behavior can lead to privilege escalation in programs using the idna...

AZL-87663 CVE-2026-39821 affecting package docker-cli for versions less than 25.0.7-3

The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode"xn--example-.com" incorrectly returns the name "example.com" rather than an error. This behavior can lead to privilege escalation in programs using the idna...

AZL-87384 CVE-2026-39821 affecting package azcopy for versions less than 10.25.1-6

The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode"xn--example-.com" incorrectly returns the name "example.com" rather than an error. This behavior can lead to privilege escalation in programs using the idna...

AZL-87272 CVE-2026-39821 affecting package podman 5.6.1-10

The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode"xn--example-.com" incorrectly returns the name "example.com" rather than an error. This behavior can lead to privilege escalation in programs using the idna...