Linux · SUSE Linux Enterprise · Security advisory · November 7, 2026
SUSE-SU-2026:4623-1: expat security update
SUSE-SU-2026:4623-1, released November 7, 2026, fixes 34 CVEs in expat (version 2.8.5-150400.3.40.1). None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
34
1 rated Critical
Exploited
0
None reported
Highest CVSS
9.8
Base score, 0 to 10
Highest EPSS
0.1326
96th percentile
Priority of the 34 CVEs
Patch now 0
Urgent 1
High 13
Routine 20
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| expat | sles 15.6 | 2.8.5-150400.3.40.1 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| Urgent | CVE-2016-9063 | Python 3.5 and 1 other: An integer overflow during the parsing of XML using the Expat library. | 9.8 | 0.0536 | None reported |
| High | CVE-2016-0718 | Python 3.5 and 1 other: Expat allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary… | 9.8 | 0.1326 | None reported |
| High | CVE-2022-43680 | expat: In libexpat through 2.4.9, there is a use-after free caused by overeager destruction of a shared DTD in XML_ExternalE... | 7.5 | 0.0320 | None reported |
| High | CVE-2023-52425 | expat: libexpat through 2.5.0 allows a denial of service (resource consumption)because many full reparsings are required in... | 7.5 | 0.0215 | None reported |
| High | CVE-2025-59375 | libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing. | 8.1 | 0.0138 | None reported |
| High | CVE-2024-8176 | libexpat: Multiple issues in libexpat, including unexpected app termination or arbitrary code execution | 7.5 | 0.0135 | None reported |
| High | CVE-2026-66046 | Expat Denial of Service via storeAtts() Quadratic Complexity | 7.5 | 0.0074 | None reported |
| High | CVE-2026-45186 | In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input. | 8.2 | 0.0048 | None reported |
| High | CVE-2026-93990 | Expat through 2.8.4 Malformed UTF-16 Acceptance via Unchecked Surrogate | 7.5 | 0.0040 | None reported |
| High | CVE-2026-102633 | libexpat 2.7.2 through 2.8.5 Integer Overflow in expat_realloc | 8.2 | 0.0037 | None reported |
| High | CVE-2026-77214 | libexpat Heap Buffer Over-read in xmlparse.c via XML_ParseBuffer | 8.2 | 0.0032 | None reported |
| High | CVE-2026-76956 | 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 flooding attacks, causing a denial of service via crafted XML content. | 7.5 | 0.0029 | None reported |
| High | CVE-2026-25210 | expat: In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is... | 7.8 | 0.0021 | None reported |
| High | CVE-2026-76957 | 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. | 7.8 | 0.0011 | None reported |
| Routine | CVE-2026-41080 | expat: libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document. | 2.9 | 0.0040 | None reported |
| Routine | CVE-2026-76641 | expat: out-of-bounds read vulnerability that allows attackers to trigger | n/a | 0.0035 | None reported |
| Routine | CVE-2026-32777 | libexpat before 2.7.5 allows an infinite loop while parsing DTD content. | 5.5 | 0.0023 | None reported |
| Routine | 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. | 6.2 | 0.0019 | None reported |
| Routine | CVE-2026-24515 | expat: In libexpat before 2.7.4, XML_ExternalEntityParserCreate does not copy unknown encoding handler user data. | 2.5 | 0.0019 | None reported |
| Routine | CVE-2026-50219 | libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur, | 6.9 | 0.0018 | None reported |
| Routine | CVE-2026-56412 | libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219. | 5.9 | 0.0018 | None reported |
| Routine | CVE-2026-32778 | libexpat before 2.7.5 allows a NULL pointer dereference in the function setContext on retry after an earlier ouf-of-memory condition. | 5.5 | 0.0018 | None reported |
| Routine | CVE-2026-56131 | libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation. Thus, a use-after-free can occur (similar to the CVE-2026-50219 situation). | 4.9 | 0.0018 | None reported |
| Routine | CVE-2026-56406 | libexpat before 2.8.2 has an integer overflow in XML_ParseBuffer because it lacked a check that was present in XML_Parse. | 6.9 | 0.0017 | None reported |
| Routine | CVE-2026-56407 | libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen. | 6.9 | 0.0017 | None reported |
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