FKIE_CVE-2026-26080
Vulnerability from fkie_nvd - Published: 2026-07-20 16:16 - Updated: 2026-08-25 15:43
Severity
Summary
HAProxy Community Edition 3.2.x through 3.3.x before 3.3.3 can enter a loop or crash because varint is mishandled. HAProxy Enterprise and ALOHA are also affected.
References
| URL | Tags | ||
|---|---|---|---|
| cve@mitre.org | https://git.haproxy.org/?p=haproxy-3.2.git;a=commit;h=5bb098ce8a656ec5711b4de3e4c87f12b216e7a1 | Patch, Vendor Advisory | |
| cve@mitre.org | https://www.haproxy.org | Product |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| haproxy | haproxy | * | |
| haproxy | haproxy | * | |
| haproxy | aloha | * | |
| haproxy | aloha | * | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 | |
| haproxy | haproxy_enterprise | 3.2r1 |
{
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{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "HAProxy",
"vendor": "HAProxy",
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"status": "affected",
"version": "3.2",
"versionType": "custom"
},
{
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"version": "3.3",
"versionType": "custom"
}
]
}
],
"source": "cve@mitre.org"
}
],
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "HAProxy Community Edition 3.2.x through 3.3.x before 3.3.3 can enter a loop or crash because varint is mishandled. HAProxy Enterprise and ALOHA are also affected."
}
],
"id": "CVE-2026-26080",
"lastModified": "2026-08-25T15:43:56.200",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 3.7,
"baseSeverity": "LOW",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"exploitabilityScore": 2.2,
"impactScore": 1.4,
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"type": "Secondary"
}
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"role": "CISA Coordinator",
"timestamp": "2026-07-20T18:16:29.299899Z",
"version": "2.0.3"
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},
"published": "2026-07-20T16:16:57.057",
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"vulnStatus": "Analyzed",
"weaknesses": [
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"description": [
{
"lang": "en",
"value": "CWE-252"
}
],
"source": "cve@mitre.org",
"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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