CVE-2026-102633

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Source
https://cve.org/CVERecord?id=CVE-2026-102633
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-102633.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-102633
Downstream
ALPINE (1)
AZL (1)
BELL (1)
DEBIAN (1)
ECHO (1)
openSUSE (1)
RLSA (2)
SUSE (3)
UBUNTU (1)
Related
ALSA (2)
openSUSE (1)
SUSE (3)
Published
2026-09-29T16:04:16Z
Modified
2026-10-23T14:57:00Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
libexpat 2.7.2 through 2.8.5 Integer Overflow in expat_realloc
Details

libexpat versions 2.7.2 through 2.8.5 contain an integer overflow vulnerability in expat_realloc() function on 32-bit platforms when computing allocation sizes. Attackers supplying malicious XML to applications parsing with vulnerable libexpat can cause heap buffer overflow, memory corruption, or denial of service.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102633.json"
}
References

Affected packages

Git / github.com/libexpat/libexpat

Affected ranges

Type
GIT
Repo
https://github.com/libexpat/libexpat
Events
Introduced
7643f96bd5b9f5d3b26ea112519e05e17ef91cfb
Fixed
209801d7fbaf07ab74bae8cb32dd2ab9e5846118
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "2.7.2"
                },
                {
                    "last_affected": "2.8.5"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "fixed": "209801d7fbaf07ab74bae8cb32dd2ab9e5846118"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

Other
R_2_7_2
R_2_7_3
R_2_7_4
R_2_7_5
R_2_8_0
R_2_8_1
R_2_8_2
R_2_8_3
R_2_8_4
R_2_8_5

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-102633.json"