CVE-2026-123523
📛 CVE Title
Vikunja before 2.7.1 Memory Exhaustion via Unbounded Avatar Size Cache
Description
Vikunja before 2.7.1 contains an uncontrolled resource consumption vulnerability that allows authenticated users to exhaust server memory by requesting avatars at many distinct sizes. Attackers can upload a noisy avatar and fetch it at each size up to 1024, caching roughly a gigabyte per account without eviction and causing the API process to be OOM-killed.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- VulnCheck
- CVSS severity
- HIGH
- CVSS score
- 7.1 / 10
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N- Effective score
- 7.1 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-770 - Reserved
- 2026-11-06
- Published
- 2026-11-08 01:37 UTC
- Last updated
- 2026-11-08 01:37 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/123xxx/CVE-2026-123523.json
- Linked Threat
- CVE-2026-123523 — Vikunja before 2.7.1 Memory Exhaustion via Unbounded Avatar Size Cache
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-119408
EUVD enrichment is queued; refresh the page in a few seconds.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| go-vikunja | vikunja |
0 (affected),
2.7.1 (unaffected)
|
— |
Vendor references (2)
References embedded in the original CVE record by the assigning CNA.
- GitHub Security Advisory (GHSA-3x3m-2j93-w46j) vendor-advisory
- VulnCheck Advisory: Vikunja before 2.7.1 Memory Exhaustion via Unbounded Avatar Size Cache third-party-advisory
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
Remediations (10)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:access.redhat.com
What is a mitigation ? A mitigation is an action that can be taken to reduce the impact of a security vulnerability, without deploying any fixes.
2026-11-08 10:25 UTC -
web:crimsondesert.pearlabyss.com
Here are the fixes and improvements that have been added this patch . The patch is rolling out across all platforms. Please refer to the Update section below to see the state of the patch for each platform. XBOX: Patch available at a later time (in-progress) Epic Games Store: Patch available at a ...
2026-11-08 10:25 UTC -
web:epatch.pa.gov
Why does PATCH exist? Its purpose is to better enable the public to obtain criminal history record checks. The repository was created and is maintained in accordance with Pennsylvania's Criminal History Information Act contained in Chapter 91 of Title 18, Crimes Code. This Act also directs the Pennsylvania State Police (PSP) to disseminate criminal history data to criminal justice agencies ...
2026-11-08 10:25 UTC -
web:senserva.com
Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.
2026-11-08 10:25 UTC -
web:support.esri.com
The issues resolved by these patches are listed in the Issues addressed with this patch section below. As part of the patch installation, the ArcGIS Server service is stopped and restarted. The restart may take several minutes depending on the number of services published on the ArcGIS Server site. This patch can be uninstalled as outlined in the Uninstalling this patch on Windows and ...
2026-11-08 10:25 UTC -
web:trust.barracuda.com
Patches If a patch has not been automatically applied, customers should manually apply the appropriate patch as soon as possible. If customers have turned off automatic patching, Barracuda recommends setting devices to automatically receive patches. Guidance on how to manually apply the patch or update firmware can be found on Barracuda Campus.
2026-11-08 10:25 UTC -
web:www.fix.com
Fix .com is a one-stop source for fixing products in and around your home. Millions of quality OEM replacement parts, repair videos, instructions, and same-day shipping available!
2026-11-08 10:25 UTC -
web:www.oracle.com
Oracle Critical Patch Update Advisory - April 2026 Description A Critical Patch Update is a collection of patches for multiple security vulnerabilities. These patches address vulnerabilities in Oracle code and in third party components included in Oracle products. These patches are usually cumulative, but each advisory describes only the security patches added since the previous Critical Patch ...
2026-11-08 10:25 UTC -
web:www.oracle.com
This Critical Patch Update contains 337 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at January 2026 Critical Patch Update: Executive Summary and Analysis.
2026-11-08 10:25 UTC -
web:www.veeam.com
CVE - 2026 -98432 is a use-after-free vulnerability in Linux kernel TCP/IPv4 connection setup (CVSS 9.8). It can lead to denial of service or memory corruption. Veeam components that include a Linux kernel are affected. Depending on the component, the patched kernel is delivered through Veeam Updater or a private fix . The following table lists the delivery for each product.
2026-11-08 10:25 UTC
AI Forensic Analysis
Only Available for Registered Users. Sign in to view.
Raw JSON
The full cvelistV5 record. Download as CVE-2026-123523.json.
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageURL": "pkg:golang/code.vikunja.io/api",
"product": "vikunja",
"vendor": "go-vikunja",
"versions": [
{
"lessThan": "2.7.1",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "2.7.1",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.7.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "NotAFlightRisk"
}
],
"datePublic": "2026-10-22T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Vikunja before 2.7.1 contains an uncontrolled resource consumption vulnerability that allows authenticated users to exhaust server memory by requesting avatars at many distinct sizes. Attackers can upload a noisy avatar and fetch it at each size up to 1024, caching roughly a gigabyte per account without eviction and causing the API process to be OOM-killed."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
},
"format": "CVSS"
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-770",
"description": "Allocation of Resources Without Limits or Throttling",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-11-08T01:37:33.144Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "GitHub Security Advisory (GHSA-3x3m-2j93-w46j)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-3x3m-2j93-w46j"
},
{
"name": "VulnCheck Advisory: Vikunja before 2.7.1 Memory Exhaustion via Unbounded Avatar Size Cache",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/vikunja-before-2.7.1-memory-exhaustion-via-unbounded-avatar-size-cache"
}
],
"title": "Vikunja before 2.7.1 Memory Exhaustion via Unbounded Avatar Size Cache",
"x_generator": {
"engine": "vulncheck-endgame"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-123523",
"datePublished": "2026-11-08T01:37:33.144Z",
"dateReserved": "2026-11-06T00:47:14.650Z",
"dateUpdated": "2026-11-08T01:37:33.144Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}