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Full vulnerability report · 2026
CVE-2026-71469High confidence

Acm-search-v2-api-rhel9: search-v2-api: unbounded tokenreviews cache allows unauthenticated memory-exhaustion dos

Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.11

7.5HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2026-71469 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityacm-search-v2-api-rhel9: search-v2-api: Unbounded tokenReviews cache allows unauthenticated memory-exhaustion DoS
24 fixed

The vendor explicitly identifies these products or versions as containing the fix.

  • registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:2e503ccacdbdb7247763d516e2f53e1ca4b31c4094a36b253b3cf3153dcf8184_amd64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.11
  • registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:8d7946dad68234eb3f93f271eb37e22034eaf083b481e4a3e613fb52d3202bf7_arm64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.11
  • registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:cf859d871fd4ecbc6a5e6f49d26eeb8a11e4d7ea7081c0064465b55c52002894_ppc64le as a component of Red Hat Advanced Cluster Management for Kubernetes 2.11
  • registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:deba8c8022a0681937918046e932d980cffbbc33dab6a8b009743aed830a36bf_s390x as a component of Red Hat Advanced Cluster Management for Kubernetes 2.11
  • registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:200e4551c2fbb3f5b292bcdbc0e39d16740842ead63a99632591da7cf9cb462e_ppc64le as a component of Red Hat Advanced Cluster Management for Kubernetes 2.13
  • registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:7bdb8b3c70a05d65da793182c392bd81c6278cb79543aa3e191b3888ddad2a2d_s390x as a component of Red Hat Advanced Cluster Management for Kubernetes 2.13
  • registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:baee0733dd1141f90342b0dd02136ca27f590cd0c27214f61f8815b0a90ed665_amd64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.13
  • registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:defa1de983ad0d1e6ad8cfd3c8cee1f73508760254ee00d57a4d175ac583c5fc_arm64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.13
  • registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:0e053b448d320b4cfedf182323a1beb2423b512fe98a2edb1383488d4ec40fcd_ppc64le as a component of Red Hat Advanced Cluster Management for Kubernetes 2.14
  • registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:2b43c8877d2df09941dd67f1ed9aad3559be2e39231262cebad3496c700e29ea_amd64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.14
  • registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:379a5067be0f1a23fea5a4145422c1c72ab6d8b4c493a89c7463e62fce054ca8_arm64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.14
  • registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:789be35c268017dceb3a57c2868b17331b4e26e28f82bd02d31691d3259c5b31_s390x as a component of Red Hat Advanced Cluster Management for Kubernetes 2.14
Summary
A flaw was found in search-v2-api. An unauthenticated attacker can exploit this by sending requests with unique random bearer tokens. Each unique token creates a permanent entry in the unbounded tokenReviews cache, which is not properly cleared. This can lead to memory exhaustion of the search-api pod, resulting in a Denial of Service (DoS).
Remediation
Before you apply this update, make sure all previously released errata that are relevant to your system are applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-57687

No EUVD known-exploited evidence

A flaw was found in search-v2-api. An unauthenticated attacker can exploit this by sending requests with unique random bearer tokens. Each unique token creates a permanent entry in the unbounded tokenReviews cache, which is not properly cleared. This can lead to memory exhaustion of the search-api pod, resulting in a Denial of Service (DoS).

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
7.5 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

A flaw was found in search-v2-api. An unauthenticated attacker can exploit this by sending requests with unique random bearer tokens. Each unique token creates a permanent entry in the unbounded tokenReviews cache, which is not properly cleared. This can lead to memory exhaustion of the search-api pod, resulting in a Denial of Service (DoS).

What

A flaw was found in search-v2-api. An unauthenticated attacker can exploit this by sending requests with unique random bearer tokens. Each unique token creates a permanent entry in the unbounded tokenReviews cache, which is not properly cleared. This can lead to memory exhaustion of the search-api pod, resulting in a Denial of Service (DoS).

Why

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

A flaw was found in search-v2-api. An unauthenticated attacker can exploit this by sending requests with unique random bearer tokens. Each unique token creates a permanent entry in the unbounded tokenReviews cache, which is not properly cleared. This can lead to memory exhaustion of the search-api pod, resulting in a Denial of Service (DoS).

Why

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Allocation of Resources Without Limits or Throttling → disrupt the affected service
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-770 ↗

CWE-770: Allocation of Resources Without Limits or Throttling. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
Stolen credentials, tokens and legitimate administration functions may provide continued access without deploying a large custom toolset.
NetworkUnauthenticatedDenial of serviceCWE-770
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-57687Official EUVD mapping

A flaw was found in search-v2-api. An unauthenticated attacker can exploit this by sending requests with unique random bearer tokens. Each unique token creates a permanent entry in the unbounded tokenReviews cache, which is not properly cleared. This can lead to memory exhaustion of the search-api pod, resulting in a Denial of Service (DoS).

Official EUVD record
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
See the vendor and CVE records for the affected range.
Fixed
registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:2e503ccacdbdb7247763d516e2f53e1ca4b31c4094a36b253b3cf3153dcf8184_amd64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.11; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:8d7946dad68234eb3f93f271eb37e22034eaf083b481e4a3e613fb52d3202bf7_arm64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.11; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:cf859d871fd4ecbc6a5e6f49d26eeb8a11e4d7ea7081c0064465b55c52002894_ppc64le as a component of Red Hat Advanced Cluster Management for Kubernetes 2.11; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:deba8c8022a0681937918046e932d980cffbbc33dab6a8b009743aed830a36bf_s390x as a component of Red Hat Advanced Cluster Management for Kubernetes 2.11; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:200e4551c2fbb3f5b292bcdbc0e39d16740842ead63a99632591da7cf9cb462e_ppc64le as a component of Red Hat Advanced Cluster Management for Kubernetes 2.13; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:7bdb8b3c70a05d65da793182c392bd81c6278cb79543aa3e191b3888ddad2a2d_s390x as a component of Red Hat Advanced Cluster Management for Kubernetes 2.13; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:baee0733dd1141f90342b0dd02136ca27f590cd0c27214f61f8815b0a90ed665_amd64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.13; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:defa1de983ad0d1e6ad8cfd3c8cee1f73508760254ee00d57a4d175ac583c5fc_arm64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.13; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:0e053b448d320b4cfedf182323a1beb2423b512fe98a2edb1383488d4ec40fcd_ppc64le as a component of Red Hat Advanced Cluster Management for Kubernetes 2.14; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:2b43c8877d2df09941dd67f1ed9aad3559be2e39231262cebad3496c700e29ea_amd64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.14; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:379a5067be0f1a23fea5a4145422c1c72ab6d8b4c493a89c7463e62fce054ca8_arm64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.14; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:789be35c268017dceb3a57c2868b17331b4e26e28f82bd02d31691d3259c5b31_s390x as a component of Red Hat Advanced Cluster Management for Kubernetes 2.14; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:2fbbe2983f9355403e70bf83fa58e69ce1257f606d8c9dcd2b9fc6f8943291b9_arm64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.15; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:45949691323704901fdb5fe1e06535de2a793b86dc6039899ca2c583f618734e_amd64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.15; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:622b9ef7f9a67711daf1c2572ed87f01f2abde2637e67f14c0c5fc5338242445_ppc64le as a component of Red Hat Advanced Cluster Management for Kubernetes 2.15; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:bbe88d4ea77f4d9b70ce06598a3e238f92d09261b641ffed32b9f94f74b48861_s390x as a component of Red Hat Advanced Cluster Management for Kubernetes 2.15; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:04dbafcece195e9ebf4f51ace953e463ce56a580512449e23d74ead3e2c73544_arm64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.16; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:3dc1c6f17a988c057ab6b49a069505ad9d6c80e914876e9d2c4482e0832b0c54_s390x as a component of Red Hat Advanced Cluster Management for Kubernetes 2.16; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:8375ffd7cdf45ea5c6c46c324067f0e7386e45ca91ae11c1f5f88d5bfc596c42_amd64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.16; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:9d144c1468242fa12b44a1297d44680fb838f67559634db1ad318ab63a10f867_ppc64le as a component of Red Hat Advanced Cluster Management for Kubernetes 2.16; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:0ace6b11b0f86b0aaf75c0b07d505bf07757d73d2b720c1375c7f1bd43c2adf0_ppc64le as a component of Red Hat Advanced Cluster Management for Kubernetes 2.17; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:404869ee47585fee60db24267b6ec8da18d78db3353b429f63c1a5d5b2435909_arm64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.17; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:af6caffd0b04b77f6eb5b1770ecf5ac3d5461cccccc45c8ed4bd461896fe5a30_amd64 as a component of Red Hat Advanced Cluster Management for Kubernetes 2.17; registry.redhat.io/rhacm2/acm-search-v2-api-rhel9@sha256:b781f7db2db26c754d9be9a7627ff846f45eb48210906e17c8061a9a0fb034eb_s390x as a component of Red Hat Advanced Cluster Management for Kubernetes 2.17
Action
Before you apply this update, make sure all previously released errata that are relevant to your system are applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 12 Aug 2026 · Last source change 5 Sept 2026, 14:24 UTC · CWE-770 · Allocation of Resources Without Limits or Throttling

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-57687
Product sourceCNA
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD awaiting enrichment

Missing structured fields: affected versions. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates →
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    See the vendor and CVE records for the affected range. · Fixed: 1787263804 < *; 1787238618 < *; 1787229541 < *
    After
    See the vendor and CVE records for the affected range. · Fixed: 1787689524 < *; 1787263804 < *; 1786723845 < *; 1787238618 < *; 1787191668 < *; 1787229541 < *
    CNA ↗
  2. Vendor guidanceAuthoritative vendor guidance changed from no authoritative guidance recorded to authoritative remediation link.
    Before
    no authoritative guidance recorded
    After
    authoritative remediation link
    CNA ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    See the vendor and CVE records for the affected range. · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    See the vendor and CVE records for the affected range. · Fixed: 1787263804 < *; 1787238618 < *; 1787229541 < *
    CNA ↗
  4. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2026-57687↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-71469 · cve.blacktree.nl