CVE-2026-92002 (GCVE-0-2026-92002)
Vulnerability from cvelistv5 – Published: 2026-09-15 11:24 – Updated: 2026-09-15 12:09
VLAI
EPSS
VEX
Title
MISP: Authentication failure logging suppressed during Redis unavailability
Summary
Affected versions of MISP use Redis to throttle repeated authentication-failure log entries. The intent is to avoid excessive duplicate logs while still recording failed authentication activity.
However, User->setupRedis() returns false when Redis cannot be reached. The vulnerable _shouldLog() logic only returned true when a Redis instance existed and no throttle key was present. Therefore, when Redis was unavailable, the function did not allow the log write at all, effectively silencing authentication-failure logging for the duration of the outage.
Version affected: ≤2.5.45
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 12:00 UTC
CWE
- CWE-778 - Insufficient Logging
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/MISP/MISP/commit/a39b25d2f | patch |
Impacted products
GCVE extensions
AI-generated
Confidence: medium
Model
qwen3.8:27b
advisory
bcp-05-x-01bcp-05-x-02
Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.
ai-computer-assisted:llm-generatedai-computer-assisted:classification
| Model | Source | Identifier |
|---|---|---|
| qwen3.8:27b | ollama | qwen3.8:27b |
- Generator
-
patch2vuln.pyon 2026-09-15 09:34 - Model
qwen3.8:27b- Input
-
https://github.com/MISP/MISP/commit/a39b25d2f.patch
ab1b5a5a68cf… - Confidence
- medium
| Commit | Subject | Patch SHA-256 |
|---|---|---|
a39b25d2f141
|
fix: [logging] Log auth failures when the throttle cannot | ab1b5a5a68cf… |
Fix summary
The _shouldLog() method now explicitly checks whether the Redis connection is available before attempting to use it. If setupRedis() returns false, the method immediately returns true, causing every authentication-failure event to be logged. This converts the previous fail-closed behavior (silence on dependency failure) into a fail-open behavior for security logging (log everything when the throttle state is unavailable), ensuring that a Redis outage cannot be used to suppress the audit trail of failed authentication attempts.
Patch summary
In app/Controller/AppController.php, the _shouldLog() method was restructured: a new early-return guard "if (!$redis) { return true; }" was inserted immediately after the setupRedis() call, so that an unavailable Redis connection causes all auth-failure events to be logged. The subsequent throttle check was simplified to "if (!$redis->exists(...))" since the null case is already handled. Additionally, a block of commented-out Redis throttle code in the afterFilter() method (lines referencing misp:auth_fail_throttling) was removed as dead code.
CVSS rationale
The vulnerability is reachable over the network (AV:N) because MISP is a web application. Attack complexity is High (AC:H) because exploitation requires the Redis instance to be specifically unavailable at the time authentication failures occur; it is not a simple request. No attack target is required (AT:N). No privileges are needed (PR:N) because the suppressed logs pertain to unauthenticated authentication-failure events. No user interaction is required (UI:N). There is no direct confidentiality or integrity impact on the MISP data store (VC:N, VI:N). The availability impact is Low (VA:L) because the security-logging/audit function is unavailable during the Redis outage, impairing detection and forensic capabilities, but the core MISP service remains operational. No cross-scope impacts (SC:N, SI:N, SA:N).
Weakness rationale
- CWE-778 The system fails to record security-relevant events (authentication failures) when a supporting dependency (Redis) is unavailable. The logging path silently drops all audit entries under a specific operational condition, which is a textbook case of insufficient logging of security events.
Assumptions to verify
- The affected version range is inferred from the tag_version_boundary metadata (v2.5.46 with 189 commits after the fix), suggesting the fix landed before the v2.5.46 release; exact affected version boundaries are not explicitly stated in the patch.
- The CVSS availability impact (VA:L) reflects the loss of the security-logging function rather than a denial of service against the MISP application itself.
- The patch does not indicate whether the Redis throttle was the sole mechanism for auth-failure logging or whether a fallback file-based logger existed; the analysis assumes the Redis-gated path was the primary logging path for auth failures.
- The commit date (2 Sep 2026) is taken at face value from the patch metadata.
Model comparison
Selected qwen3.8:27b
by deterministic-consensus-v1
The selected result is closest to model consensus; this heuristic does not establish factual correctness and human review remains required.
| Model | Score | Agreement | Confidence | Assumptions |
|---|---|---|---|---|
qwen3.8:27b |
6 | 9 | medium | 4 |
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"cweId": "CWE-778",
"description": "CWE-778 Insufficient Logging",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-15T11:24:21.354Z",
"orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
"shortName": "CIRCL"
},
"references": [
{
"name": "Security patch",
"tags": [
"patch"
],
"url": "https://github.com/MISP/MISP/commit/a39b25d2f"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eThe _shouldLog() method now explicitly checks whether the Redis connection is available before attempting to use it. If setupRedis() returns false, the method immediately returns true, causing every authentication-failure event to be logged. This converts the previous fail-closed behavior (silence on dependency failure) into a fail-open behavior for security logging (log everything when the throttle state is unavailable), ensuring that a Redis outage cannot be used to suppress the audit trail of failed authentication attempts.\u003c/p\u003e"
}
],
"value": "The _shouldLog() method now explicitly checks whether the Redis connection is available before attempting to use it. If setupRedis() returns false, the method immediately returns true, causing every authentication-failure event to be logged. This converts the previous fail-closed behavior (silence on dependency failure) into a fail-open behavior for security logging (log everything when the throttle state is unavailable), ensuring that a Redis outage cannot be used to suppress the audit trail of failed authentication attempts."
}
],
"title": "MISP: Authentication failure logging suppressed during Redis unavailability",
"x_gcve": [
{
"extensions": {
"bcp-05-x-01": {
"ai_annotations": [
{
"ai_level": "generated",
"description": "Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.",
"gna_source": 1,
"models": [
{
"gna_source": 1,
"identifier": "qwen3.8:27b",
"name": "qwen3.8:27b",
"source": "ollama"
}
],
"review_status": "review",
"scope": "record",
"tags": [
"ai-computer-assisted:llm-generated",
"ai-computer-assisted:classification"
]
}
]
},
"bcp-05-x-02": {
"x_patch2vuln": {
"assumptions": [
"The affected version range is inferred from the tag_version_boundary metadata (v2.5.46 with 189 commits after the fix), suggesting the fix landed before the v2.5.46 release; exact affected version boundaries are not explicitly stated in the patch.",
"The CVSS availability impact (VA:L) reflects the loss of the security-logging function rather than a denial of service against the MISP application itself.",
"The patch does not indicate whether the Redis throttle was the sole mechanism for auth-failure logging or whether a fallback file-based logger existed; the analysis assumes the Redis-gated path was the primary logging path for auth failures.",
"The commit date (2 Sep 2026) is taken at face value from the patch metadata."
],
"commit": "a39b25d2f141dde954a2f00feed5c6eb9e3989b5",
"confidence": "medium",
"credits": [
{
"lang": "en",
"type": "remediation developer",
"value": "iglocska"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Claude Opus 5 (1M context)"
}
],
"cvssRationale": "The vulnerability is reachable over the network (AV:N) because MISP is a web application. Attack complexity is High (AC:H) because exploitation requires the Redis instance to be specifically unavailable at the time authentication failures occur; it is not a simple request. No attack target is required (AT:N). No privileges are needed (PR:N) because the suppressed logs pertain to unauthenticated authentication-failure events. No user interaction is required (UI:N). There is no direct confidentiality or integrity impact on the MISP data store (VC:N, VI:N). The availability impact is Low (VA:L) because the security-logging/audit function is unavailable during the Redis outage, impairing detection and forensic capabilities, but the core MISP service remains operational. No cross-scope impacts (SC:N, SI:N, SA:N).",
"draft": false,
"fixSummary": "The _shouldLog() method now explicitly checks whether the Redis connection is available before attempting to use it. If setupRedis() returns false, the method immediately returns true, causing every authentication-failure event to be logged. This converts the previous fail-closed behavior (silence on dependency failure) into a fail-open behavior for security logging (log everything when the throttle state is unavailable), ensuring that a Redis outage cannot be used to suppress the audit trail of failed authentication attempts.",
"generatedAt": "2026-09-15T09:34:28.852379Z",
"generator": "patch2vuln.py",
"model": "qwen3.8:27b",
"modelComparison": {
"rankings": [
{
"agreementScore": 9,
"assumptionCount": 4,
"confidence": "medium",
"model": "qwen3.8:27b",
"score": 6
}
],
"selectedModel": "qwen3.8:27b",
"selectionMethod": "deterministic-consensus-v1",
"selectionNotice": "The selected result is closest to model consensus; this heuristic does not establish factual correctness and human review remains required."
},
"patchSha256": "ab1b5a5a68cf32cfb514f541d5db607932836ebf557634a44adfa822631afe9c",
"patchSummary": "In app/Controller/AppController.php, the _shouldLog() method was restructured: a new early-return guard \"if (!$redis) { return true; }\" was inserted immediately after the setupRedis() call, so that an unavailable Redis connection causes all auth-failure events to be logged. The subsequent throttle check was simplified to \"if (!$redis-\u003eexists(...))\" since the null case is already handled. Additionally, a block of commented-out Redis throttle code in the afterFilter() method (lines referencing misp:auth_fail_throttling) was removed as dead code.",
"patchTruncated": false,
"patches": [
{
"commit": "a39b25d2f141dde954a2f00feed5c6eb9e3989b5",
"patchSha256": "ab1b5a5a68cf32cfb514f541d5db607932836ebf557634a44adfa822631afe9c",
"source": "https://github.com/MISP/MISP/commit/a39b25d2f.patch",
"sourceUrl": "https://github.com/MISP/MISP/commit/a39b25d2f.patch",
"subject": "fix: [logging] Log auth failures when the throttle cannot"
}
],
"source": "https://github.com/MISP/MISP/commit/a39b25d2f.patch",
"subject": "fix: [logging] Log auth failures when the throttle cannot",
"tagVersionBoundary": {
"commits_after_fix": 189,
"repository": "https://github.com/MISP/MISP",
"tag": "v2.5.46",
"version": "2.5.46",
"version_type": "semver"
},
"weaknessRationale": [
{
"cweId": "CWE-778",
"rationale": "The system fails to record security-relevant events (authentication failures) when a supporting dependency (Redis) is unavailable. The logging path silently drops all audit entries under a specific operational condition, which is a textbook case of insufficient logging of security events."
}
]
}
}
},
"recordType": "advisory",
"vulnId": "GCVE-1-2026-20172"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
"assignerShortName": "CIRCL",
"cveId": "CVE-2026-92002",
"datePublished": "2026-09-15T11:24:21.354Z",
"dateReserved": "2026-09-15T11:24:19.778Z",
"dateUpdated": "2026-09-15T12:09:48.540Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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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.