CVE-2025-58186: Lack of limit when parsing cookies can cause memory exhaustion in net/http

Deferred

AliasesUBUNTU-CVE-2025-58186DEBIAN-CVE-2025-58186CGA-2256-p4qp-gq2h+3972 more

Published 29-10-2025Last modified 04-11-2025

Vulnerability summary

CVE-2025-58186 is a medium (CVSS 5.3) vulnerability in go standard library net/http. EPSS estimates a 0.56% chance of exploitation in the next 30 days, higher than 46.9% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

5.3/10

010

Medium · v3.1 (CVE.org)

EPSS score

0.56%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 22 · Related 95

MGASA-2025-0256 OPENSUSE-SU-2025:15608-1 OPENSUSE-SU-2025:15609-1 OPENSUSE-SU-2025:15695-1 OPENSUSE-SU-2025:15723-1 OPENSUSE-SU-2025:20157-1+90 more

Timeline

29-10-2025
PublishedVulnerability first disclosed.
04-11-2025
Last modifiedVulnerability information updated.

Description

Despite HTTP headers having a default limit of 1MB, the number of cookies that can be parsed does not have a limit. By sending a lot of very small cookies such as "a=;", an attacker can make an HTTP server allocate a large amount of structs, causing large memory consumption.

CVSS metrics

5 scores · 5 sources · 1 version

v3.15.3

EPSS trend

Probability

0.56%

Chance of exploitation in the next 30 days

Percentile

47%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.56% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard199 products

age< 1.2.1-r8
age-fips< 1.2.1-r8
amass< 5.0.1-r1
amazon-k8s-cni-fips< 1.20.4-r2
amazon-k8s-cni-init-fips< 1.20.4-r2

amazon-k8s-cni-init-fips-compat< 1.20.4-r2
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apm-server-7.17< 7.17.29-r4
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apm-server-8.17-compat< 8.17.10-r2
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apm-server-8.18-compat< 8.18.8-r1
apm-server-fips-7.17< 7.17.29-r4
apm-server-fips-7.17-compat< 7.17.29-r4
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apm-server-fips-8.17-compat< 8.17.10-r1
apm-server-fips-8.18< 8.18.8-r1
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apm-server-fips-9.0< 9.0.8-r1
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authservice-fips< 1.1.1-r1
authservice-fips-compat< 1.1.1-r1
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aws-privateca-issuer-compat-fips< 1.7.0-r3
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azurefile-csi-1.30-compat< 1.30.10-r5
azurefile-csi-1.31< 1.31.8-r1
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azurefile-csi-fips-1.30-compat< 1.30.10-r5
azurefile-csi-fips-1.31< 1.31.8-r1
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bazelisk< 1.27.0-r1
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blob-csi-fips-1.26< 1.26.7-r3
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blobfuse2-fips< 2.4.2-r6
blobfuse2-fips-health-monitor< 2.4.2-r6
blobfuse2-fips-syslog< 2.4.2-r6
bom< 0.7.1-r1
boring-registry< 0.16.6-r2
boring-registry-fips< 0.16.6-r2
cadvisor< 0.53.0-r6
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calico-3.29< 3.29.6-r1
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calico-app-policy-3.29< 3.29.6-r1
calico-cni-3.29< 3.29.6-r1
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calico-felix-3.29< 3.29.6-r1
calico-key-cert-provisioner-3.29< 3.29.6-r1
calico-kube-controllers-3.29< 3.29.6-r1
calico-node-3.29< 3.29.6-r1
calico-pod2daemon-3.29< 3.29.6-r1
calico-pod2daemon-flexvol-compat-3.29< 3.29.6-r1
calico-typha-client-3.29< 3.29.6-r1
calico-typhad-3.29< 3.29.6-r1
calicoctl-3.29< 3.29.6-r1
capslock< 0.2.8-r1
cargobump< 0.1.0-r7
cephcsi-fips< 3.15.0-r3
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cert-manager-cmctl< 2.3.0-r5
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chartmuseum< 0.16.3-r8
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cilium-1.15-hubble-relay< 1.15.19-r3
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cilium-1.15-operator-aws< 1.15.19-r3
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cilium-fips-1.15-container-init< 1.15.19-r7
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cilium-fips-1.15-host-utils< 1.15.19-r7
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cis-operator-1.2< 1.2.7-r5
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cloud-provider-aws-fips-1.28< 1.28.11-r11
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cloud-provider-aws-fips-1.28-ecr-credential-provider< 1.28.11-r11
cloud-provider-aws-fips-1.29< 1.29.8-r11
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cloud-provider-azure-1.27< 1.27.21-r15
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cloud-provider-azure-1.29< 1.29.15-r5
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cloud-provider-azure-1.31< 1.31.9-r1
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cloud-provider-azure-cloud-controller-manager-1.27-compat< 1.27.21-r15
cloud-provider-azure-cloud-controller-manager-1.28< 1.28.14-r11
cloud-provider-azure-cloud-controller-manager-1.28-compat< 1.28.14-r11
cloud-provider-azure-cloud-controller-manager-1.29< 1.29.15-r5
cloud-provider-azure-cloud-controller-manager-1.29-compat< 1.29.15-r5
cloud-provider-azure-cloud-controller-manager-1.30< 1.30.15-r1
cloud-provider-azure-cloud-controller-manager-1.30-compat< 1.30.15-r1
cloud-provider-azure-cloud-controller-manager-1.31< 1.31.9-r1
cloud-provider-azure-cloud-controller-manager-1.31-compat< 1.31.9-r1
cloud-provider-azure-cloud-controller-manager-1.33< 1.33.3-r1
cloud-provider-azure-cloud-controller-manager-1.33-compat< 1.33.3-r1
cloud-provider-azure-cloud-controller-manager-fips-1.27< 1.27.21-r14

Show all 199

Alpine1 product

go< 1.24.8-r0 | < 1.25.2-r0

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References

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