CVE-2025-58183VulnerabilityPublished 23 Feb 2026Updated 30 Oct 2026

Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.1.5

Affects Red HatSource GCVE Database

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Mentioned vulnerabilities

CVE-2025-61729

Authoritative record:CVE-2025-58183· Medium 4.3

Not known to be exploited · CVSS 4.3 Medium · fixed in Red Hat package updates : update Red Hat tar when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score

4.3Medium

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

EPSS: 0.4% chance of exploitation in 30 days – higher than 38% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 3.1.5

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

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

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: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
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: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 29 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 30 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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

Affected software

Product	Affected	Fixed in
Gogithub.com/golang/go/src/archive/tar`pkg:golang/github.com/golang/go/src/archive/tar`Other threats	Affected =0 =1.25.0	Fixed in–

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

AI-suggested

A fix is available in Red Hat OpenShift Service Mesh version 3.1.5, which updates Istio to version 1.26.8 and addresses this vulnerability. Users should upgrade to version 3.1.5 or later to remediate this issue. No alternative mitigations are currently available or recommended by Red Hat. Refer to the official Red Hat advisory RHSA-2026:3108 for detailed upgrade instructions.

Description

Red Hat OpenShift Service Mesh 3.1.5, which is based on the open source Istio project, addresses a variety of problems in a microservice architecture by creating a centralized point of control in an application. Fixes/Improvements: * Updated to Istio version 1.26.8 * OCSP Memory Leak Check BSSL-Compatability Security Fix(es): * istio-rhel9-operator: Excessive resource consumption when printing error string for host certificate validation in crypto/x509 (CVE-2025-61729) * istio-pilot-rhel9: Excessive resource consumption when printing error string for host certificate validation in crypto/x509 (CVE-2025-61729) * istio-cni-rhel9: Excessive resource consumption when printing error string for host certificate validation in crypto/x509 (CVE-2025-61729) * istio-cni-rhel9: Unbounded allocation when parsing GNU sparse map (CVE-2025-58183)

Impact

Successful exploitation of this vulnerability can cause the affected Go application within Red Hat OpenShift Service Mesh to consume excessive memory, leading to an out-of-memory condition and denial of service. There is no impact on confidentiality or integrity. No known exploits are currently reported in the wild. The denial of service could disrupt microservice communication managed by the service mesh, potentially affecting application availability.

Summary

CVE-2025-58183 is a vulnerability in the Go standard library's archive/tar package used by Red Hat OpenShift Service Mesh prior to version 3.1.5. The tar.Reader does not limit the number of sparse region data blocks in GNU tar pax 1.0 sparse files. An attacker supplying a specially crafted tar archive with a large number of sparse regions can cause the Go application to allocate excessive memory, resulting in an out-of-memory condition and denial of service. This vulnerability is rated with moderate severity by Red Hat but is classified as high severity in this advisory due to its impact on availability. Red Hat OpenShift Service Mesh 3.1.5 includes a fix by updating to Istio 1.26.8, which addresses this and related resource consumption issues. Exploitation requires the ability to process malicious tar archives within the affected software components.

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).
CWE-1050Excessive Platform Resource Consumption within a Loop (opens in a new tab)
Base weakness
The product has a loop body or loop condition that contains a control element that directly or indirectly consumes platform resources, e.g. messaging, sessions, locks, or file descriptors.
OWASP Cheat Sheets
File Upload (opens in a new tab)
OWASP ASVS 4.0.3
V12.1.1 (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

AI analysisMachine-generated, updated 14 Aug 2026, 21:34 UTC

WeaknessesCWE-770, CWE-1050

Technical details

References

Community reviews

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