CVE-2026-76957: Use After Free

libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412...

PT-2026-78884

This update for MozillaThunderbird fixes the following issues: Update to Mozilla Thunderbird 153.5 MFSA 2026-110, bsc1284493: - CVE-2026-109704: Privilege escalation in the Application Update component. - CVE-2026-109705: Sandbox escape, site isolation issue due to incorrect boundary conditions,...

Linux Distros Unpatched Vulnerability : CVE-2026-76957

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after- free can occur. NOTE: this is similar to...

Linux Distros Unpatched Vulnerability : CVE-2026-76956

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, which results in being vulnerable to hash...

SUSE CVE-2026-72522

libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the toUtf16 functions...

Unity Linux 20.1050e / 20.1060e / 20.1070-8ae / 20.1070e Security Update: mozjs78 (UTSA-2024-003381)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2024-003381 advisory. In Expat aka libexpat before 2.4.3, a left shift by 29 or more places in the storeAtts function in xmlparse.c can lead to realloc misbehavior e.g., allocating too fe...

Unity Linux 20.1070e Security Update: expat (UTSA-2026-099491)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-099491 advisory. libexpat before 2.8.2 does not consider XMLTOKDATACHARS in doCdataSection and thus lacks handler call depth tracking for various calls from within handlers in cases ...

Unity Linux 20.1050e / 20.1060e / 20.1070-8ae / 20.1070e Security Update: mozjs78 (UTSA-2024-003380)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2024-003380 advisory. xmltokimpl.c in Expat aka libexpat before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context...

Unity Linux 20.1070e Security Update: expat (UTSA-2026-099471)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-099471 advisory. In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is...

expat: libexpat: Denial of Service due to incorrect Unicode surrogate handling

A flaw in libexpat's toUtf16 functions mishandles Unicode low surrogates by treating them as high surrogates. An attacker can exploit the resulting out-of-bounds read to trigger an infinite loop, causing a denial of service DoS...

expat: Fix of CVE-2026-56131

CVE-2026-56131: fix use-after-free caused by XMLResumeParser being callable from inside a handler, which re-enters the parser while the outer frame still owns bufferPtr/eventPtr...

CVE-2026-72522

A flaw in libexpat's toUtf16 functions mishandles Unicode low surrogates by treating them as high surrogates. An attacker can exploit the resulting out-of-bounds read to trigger an infinite loop, causing a denial of service DoS. Mitigation Limit exposure by restricting the parsing of untrusted or...

libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the *_toUtf16 functions.

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CVE-2026-72522

libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the toUtf16 functions...

AZL-94698 CVE-2026-72522 affecting package expat for versions less than 2.8.3-1

libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the toUtf16 functions...

CVE-2026-72522

libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the toUtf16 functions...

UBUNTU-CVE-2026-72522

libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the toUtf16 functions...

CVE-2026-72522

CVE-2026-72522 affects libexpat before 2.8.3, where an out-of-bounds read and infinite loop occur because low surrogates are treated the same as high surrogates in the *_toUtf16 functions. The vulnerability is an availability issue (HIGH impact) with local attack requirements and no confidentiali...

CVE-2026-72522

libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the toUtf16 functions...

CVE-2026-72522

libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the toUtf16 functions...