CVE-2026-115506

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Source
https://cve.org/CVERecord?id=CVE-2026-115506
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115506.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-115506
Downstream
ALPINE (1)
AZL (2)
BELL (1)
CGA (8)
DEBIAN (1)
ECHO (1)
openSUSE (1)
ROOT (2)
UBUNTU (1)
Related
Published
2026-10-22T19:14:06Z
Modified
2026-11-04T17:27:19Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
libexpat through 2.9.0 Denial of Service via Billion Laughs Detection Delay
Details

libexpat through 2.9.0 contains a denial of service vulnerability because billion laughs protection in accountingDiffTolerated() in xmlparse.c detects entity amplification too late. Attackers can supply a moderately sized XML document with a large DTD and nested entity expansions to consume tens of seconds of CPU per parse.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-776"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115506.json"
}
References

Affected packages

Git / github.com/libexpat/libexpat

Affected ranges

Type
GIT
Repo
https://github.com/libexpat/libexpat
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last Affected
a76b1174c1ea52abb639a4c69d52b630a8a106a2
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "last_affected": "2.9.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "cpe": "cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "last_affected": "2.9.0"
                }
            ],
            "source": "CPE_RANGE"
        }
    ]
}

Affected versions

Other
REC1_0
R_1_95_0
R_1_95_2
R_1_95_3
R_1_95_4
R_1_95_5
R_1_95_6
R_1_95_7
R_1_95_8
R_2_0_0
R_2_0_1
R_2_1_0
R_2_1_1
R_2_2_0
R_2_2_1
R_2_2_10
R_2_2_2
R_2_2_3
R_2_2_4
R_2_2_5
R_2_2_6
R_2_2_7
R_2_2_8
R_2_2_9
R_2_3_0
R_2_4_0
R_2_4_1
R_2_4_2
R_2_4_3
R_2_4_4
R_2_4_5
R_2_4_6
R_2_4_7
R_2_4_8
R_2_4_9
R_2_5_0
R_2_6_0
R_2_6_1
R_2_6_2
R_2_6_3
R_2_6_4
R_2_7_0
R_2_7_1
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
R_2_9_0
V1990307
V19981122
V19981231
V19990109
V19990425
V19990626
V19990709
V19990728
V19991013
V1_0
V1_1
V20000512
beta2
beta3
beta4
jclark-orig
libexpat-alpha-1
sourceforge_init
start

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115506.json"