CVE-2026-41080VulnerabilityPublished 24 Sep 2026Updated 10 Nov 2026

SUSE · Security update for expat

Affects SUSESource GCVE Database

Compare

Mentioned vulnerabilities

Authoritative record:CVE-2026-41080· Low 2.9

Not known to be exploited · CVSS 2.9 Low : upgrade SUSE libexpat to 2.8.0 when convenient.

Data as of 10 Nov 2026, 20:06 UTC

CVSS 3.1 base score

2.9Low

How severe the flaw is on the 0–10 CVSS scale.

Patch: Available – fixed in 2.8.0

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector: Local
Attack Complexity: High
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: Low

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Local: The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or remotely (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., tricking a legitimate user into opening a malicious document).
Attack Complexity: High: A successful attack depends on conditions beyond the attacker's control. That is, a successful attack cannot be accomplished at will, but requires the attacker to invest in some measurable amount of effort in preparation or execution against the vulnerable component before a successful attack can be expected. For example, a successful attack may require an attacker to: gather knowledge about the environment in which the vulnerable target/component exists; prepare the target environment to improve exploit reliability; or inject themselves into the logical network path between the target and the resource requested by the victim in order to read and/or modify network communications (e.g., a man in the middle attack).
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 16 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade libexpat and libexpat/libexpat to 2.8.0.

Affected software

Product	Affected	Fixed in
libexpat projectlibexpat	Affected <2.8.0	Fixed in 2.8.0
GitHublibexpat/libexpat`pkg:github/libexpat/libexpat`Other threats	Affected <2.8.0	Fixed in 2.8.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

This update for expat fixes the following issues: - CVE-2026-41080: crafted XML document can cause a denial of service (bsc#1262263). - 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 (bsc#1264713). - 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 (bsc#1267631). - 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 (bsc#1268572). - CVE-2026-56132: mishandled memory reallocation during array scaffolding in doProlog can cause heap-based buffer overflows (bsc#1268573). - CVE-2026-56403: integer overflow in the storeAtts function can cause memory corruption and potential arbitrary code execution (bsc#1275096). - CVE-2026-56404: integer overflow in the addBinding function can cause undersized memory allocations, memory corruption, and application crashes (bsc#1275096). - CVE-2026-56405: integer overflow in the getAttributeId function can cause heap memory corruption and arbitrary code execution (bsc#1275096). - CVE-2026-56406: missing bounds validation in XML_ParseBuffer can cause integer overflows, memory corruption, and application crashes (bsc#1275096). - CVE-2026-56407: integer overflow in doProlog related to entity text length can cause memory corruption and denial of service (bsc#1275096). - CVE-2026-56408: integer overflow in the copyString function can cause heap memory corruption and application crashes (bsc#1275096). - CVE-2026-56409: integer overflow in the xmlwf utility output filename handling can allow path buffer corruption and arbitrary file write conditions (bsc#1275096). - CVE-2026-56410: integer overflow in resolveSystemId within the xmlwf utility can cause memory corruption, information disclosure, and potential code execution (bsc#1275096). - CVE-2026-56411: integer overflow in endDoctypeDecl via NOTATION declarations in xmlwf can cause memory corruption and denial of service (bsc#1275096). - CVE-2026-56412: incomplete handler call depth tracking in doCdataSection can cause use-after-free conditions and arbitrary code execution (bsc#1275096). - CVE-2026-66046: libexpat: denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function in xmlparse.c (bsc#1275732). - CVE-2026-72522: libexpat: out-of-bounds read and resultant infinite loop due to low surrogates being treated the same as high surrogates during Unicode processing (bsc#1275594). - CVE-2026-76641: Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption (bsc#1275915). - 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 X (bsc#1275860). - CVE-2026-76957: libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. (bsc#1275859). Changes for expat: - Updated to version 2.8.4

GCVE source: db.gcve.eu
Csaf Category: csaf_security_advisory
Csaf Version: 2.0
Publisher: SUSE Product Security Team
Advisory ID: openSUSE-SU-2026:21945-1
Vendor Severity: high
CVE Count: 20
Additional Cves: CVE-2026-45186, CVE-2026-50219, CVE-2026-56131, CVE-2026-56132, CVE-2026-56403, CVE-2026-56404, CVE-2026-56405, CVE-2026-56406, CVE-2026-56407, CVE-2026-56408, CVE-2026-56409, CVE-2026-56410, CVE-2026-56411, CVE-2026-56412, CVE-2026-66046, CVE-2026-72522, CVE-2026-76641, CVE-2026-76956, CVE-2026-76957

References

Community reviews

Loading reviews…