CVE-2026-13608 (GCVE-0-2026-13608)
Vulnerability from cvelistv5 – Published: 2026-09-06 17:47 – Updated: 2026-09-15 06:02
VLAI
EPSS
VEX
Title
OpenLDAP SASL authentication bypass
Summary
A flaw in the libcurl SASL negotiation for LDAP authentication allows an
incomplete handshake sequence to be misinterpreted as a successful
cryptographic verification. An attacker executing a Man-in-the-Middle (MITM)
attack can inject a premature or shortcut response that bypasses complete peer
validation.
Severity
7.4 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 15:39 UTC
CWE
- CWE-923 - Improper Restriction of Communication Channel to Intended Endpoints
Assigner
References
Impacted products
3 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| curl | curl |
Affected:
7.82.0 , < 8.14.2
(semver)
Affected: 8.15.0 , < 8.16.1 (semver) Affected: 8.17.0 , < 8.20.1 (semver) Affected: 8.21.0 , < 8.22.0 (semver) |
guessed | |
| curl | curl |
Affected:
eeca818b1e8d1e61c2d4d833aed56ce4c510a9d4 , < ea71c3b6b60e563651ea8596a975aef0c8199519
(git)
|
guessed | |
| curl | curl |
Affected:
8.21.0
Affected: 8.20.0 Affected: 8.19.0 Affected: 8.18.0 Affected: 8.17.0 Affected: 8.16.0 Affected: 8.15.0 Affected: 8.14.1 Affected: 8.14.0 Affected: 8.13.0 Affected: 8.12.1 Affected: 8.12.0 Affected: 8.11.1 Affected: 8.11.0 Affected: 8.10.1 Affected: 8.10.0 Affected: 8.9.1 Affected: 8.9.0 Affected: 8.8.0 Affected: 8.7.1 Affected: 8.7.0 Affected: 8.6.0 Affected: 8.5.0 Affected: 8.4.0 Affected: 8.3.0 Affected: 8.2.1 Affected: 8.2.0 Affected: 8.1.2 Affected: 8.1.1 Affected: 8.1.0 Affected: 8.0.1 Affected: 8.0.0 Affected: 7.88.1 Affected: 7.88.0 Affected: 7.87.0 Affected: 7.86.0 Affected: 7.85.0 Affected: 7.84.0 Affected: 7.83.1 Affected: 7.83.0 Affected: 7.82.0 |
guessed |
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{
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},
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}
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"title": "CISA ADP Vulnrichment"
}
],
"cna": {
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{
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},
{
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"repo": "https://github.com/curl/curl.git",
"vendor": "curl",
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"status": "affected",
"version": "eeca818b1e8d1e61c2d4d833aed56ce4c510a9d4",
"versionType": "git"
}
]
},
{
"defaultStatus": "unaffected",
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},
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},
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},
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},
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},
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{
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"status": "affected",
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},
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"status": "affected",
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},
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"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
"version": "8.1.0"
},
{
"status": "affected",
"version": "8.0.1"
},
{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
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},
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},
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],
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}
],
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]
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],
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"orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
"shortName": "curl"
},
"references": [
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},
{
"url": "https://curl.se/docs/CVE-2026-13608.html"
},
{
"url": "https://hackerone.com/reports/3822248"
}
],
"title": "OpenLDAP SASL authentication bypass",
"x_generator": {
"engine": "cvelib 1.8.0"
},
"x_osv": {
"affected": [
{
"ranges": [
{
"events": [
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"introduced": "7.82.0"
},
{
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},
{
"introduced": "8.15.0"
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},
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}
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"aliases": [
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],
"credits": [
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"type": "finder"
},
{
"name": "Eunsoo Kim",
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],
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},
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"published": "2026-09-02T08:00:00.00Z",
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"datePublished": "2026-09-06T17:47:01.951Z",
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"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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