CVE-2025-61726VulnerabilityPublished 26 Feb 2026Updated 26 Oct 2026

Red Hat Security Advisory: Red Hat build of OpenTelemetry 3.9.0 release

Affects Red HatSource GCVE Database

Authoritative record:CVE-2025-61726· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade Red Hat url to 1.25.6 or 1.24.12 soon.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 2.2% chance of exploitation in 30 days – higher than 83% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 1.25.6, 1.24.12

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 28 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade net/url to 1.25.6 or 1.24.12.

Affected software

Product	Affected	Fixed in
Go standard librarynet/url	Affected >=1.25.0 <1.25.6	Fixed in 1.25.6
Go standard librarynet/url	Affected <1.24.12	Fixed in 1.24.12
Gonet/url`pkg:golang/net/url`Other threats	Affected =1.25.0	Fixed in–
Gonet/url`pkg:golang/net/url`Other threats	Affected <1.24.12 >=1.25.0 <1.25.6	Fixed in 1.24.12 1.25.6

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

This release of the Red Hat build of OpenTelemetry provides new features, security improvements, and bug fixes. Breaking changes: * The deprecated OpenCensus Receiver, which provided backward compatibility with the OpenCensus project for easier migration of instrumented codebases, is removed and is no longer supported. You can use the OpenTelemetry Protocol (OTLP) and OTLP Receiver instead. Deprecations: * The `otlp` name for the OTLP gRPC Exporter in the OpenTelemetry Collector custom resource (CR) is deprecated. Use the `otlp_grpc` name instead. The `otlp` name will be removed in a future release. * The `otlphttp` name for the OTLP HTTP Exporter in the OpenTelemetry Collector custom resource (CR) is deprecated. Use the `otlp_http` name instead. The `otlphttp` name will be removed in a future release. Technology Preview features: * Nothing Enhancements: * The following components, available as a Technology Preview before this update, are fully supported from version 3.9: * Target Allocator * Prometheus Exporter * Prometheus Remote Write Exporter * Filter Processor * Transform Processor * Kubernetes Events Receiver * This update introduces the Metric Start Time Processor. You can use it to add start times to cumulative metrics after the Prometheus Receiver and benefit as follows: Improve historical data analysis by adding start time data for cumulative values. Enable the back end to accurately calculate request rates per minute. Enable threshold-based alerts. * This release upgrades the Red Hat Universal Base Image (UBI) to version 9. * This update adds support for overriding the Operator configuration by using environment variables. * This update adds support for Prometheus scrape classes in the Target Allocator component. * This update changes the configuration of the Kafka Receiver and Kafka Exporter in the OpenTelemetry Collector. The top-level encoding field is now deprecated. With this update, you must set encoding per signal type under logs, metrics, and traces. Use the raw encoding for logs only, because setting it at the top level and applied to all signal types causes a startup failure. For examples, see "Kafka Receiver" and "Kafka Exporter" in the Red Hat build of OpenTelemetry documentation (docs.redhat.com/en/documentation/red_hat_build_of_opentelemetry/latest/html-single/configuring_the_collector/index). Bug fixes: * Before this update, the NGINX and Apache instrumentation init containers were created by cloning the main container's configuration. As a consequence, there were issues with cloned liveness and readiness probes. With this release, the NGINX and Apache instrumentation init containers are defined independently, rather than inheriting inappropriate probe settings from the main container. As a result, issues with cloned liveness and readiness probes no longer occur. * Before this update, the ServiceMonitor for the Operator metrics was not created due to a bug. With this release, the ServiceMonitor for the Operator metrics is created. For more information, see https://issues.redhat.com/browse/TRACING-5919. * CVE-2025-61726: Before this update, a flaw existed in the `net/url` package in the Go standard library. As a consequence, a denial-of-service HTTP request with a massive number of query parameters could cause the application to consume an excessive amount of memory and eventually become unresponsive. This release eliminates this flaw. For more information, see https://access.redhat.com/security/cve/cve-2025-61726. Known issues: * The filesystem scraper does not produce the `system.filesystem.inodes.usage` and `system.filesystem.usage` metrics in the Host Metrics Receiver after upgrading from Collector version 0.142.0 to 0.143.0 or later. No known workaround exists. For more information, see https://issues.redhat.com/browse/TRACING-5963.

CWE-770Allocation of Resources Without Limits or Throttling (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #25
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.
Requirements
Clearly specify the minimum and maximum expectations for capabilities, and dictate which behaviors are acceptable when resource allocation reaches limits.
Architecture and Design
Limit the amount of resources that are accessible to unprivileged users. Set per-user limits for resources. Allow the system administrator to define these limits. Be careful to avoid CWE-410.
Architecture and Design
Design throttling mechanisms into the system architecture. The best protection is to limit the amount of resources that an unauthorized user can cause to be expended.
OWASP Cheat Sheets
Abuse Case (opens in a new tab)
OWASP ASVS 4.0.3
V8.1.4 (opens in a new tab)
V13.4.1 (opens in a new tab)
V11.1.4 (opens in a new tab)
Attack patterns
XML Ping of the Death (opens in a new tab)
Exponential Data Expansion (opens in a new tab)
Serialized Data Parameter Blowup (opens in a new tab)
Serialized Data with Nested Payloads (opens in a new tab)
Oversized Serialized Data Payloads (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

WeaknessesCWE-770

Technical details

References

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