No exploitation reportedFix available

CVE-2025-4673

Q: Is CVE-2025-4673 actively exploited?

Active exploitation of CVE-2025-4673 has not been confirmed. Its EPSS score was 0.7% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2025-4673?

CVE-2025-4673 has a CVSS v3 base score of 6.8 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N.

No exploitation reported by the sources we read.

Published2025-06-11
Fixed in1.24.4 · 1.23.10

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Proxy-Authorization and Proxy-Authenticate headers persisted on cross-origin redirects potentially leaking sensitive information.

Timeline

dates in UTC

2025-06-1117:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2025-4673?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2025-4673?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV

golang

Branch	Affected	Fixed in	Source
1.24	≥ 1.24.0-0, < 1.24.4	1.24.4	OSV
1.23	< 1.23.10	1.23.10	OSV

stdlib

Branch	Affected	Fixed in	Source
1.24	≥ 1.24.0-0, < 1.24.4	1.24.4	OSV
1.23	< 1.23.10	1.23.10	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

delveAlmaLinux:8all versions · fixed in 1.24.1-1.module_el8.10.0+3977+66935a26
golangAlmaLinux:9all versions · fixed in 1.24.4-1.el9_6and 7 other packages
golangAlmaLinux:8all versions · fixed in 1.24.4-1.module_el8.10.0+4027+41c6fed2and 6 other packages
golang-srcAlmaLinux:10all versions · fixed in 1.24.4-1.el10_0.alma.1and 3 other packages
opentelemetry-collectorAlmaLinux:10all versions · fixed in 0.127.0-3.el10_0
opentelemetry-collectorAlmaLinux:9all versions · fixed in 0.127.0-2.el9_6

Vendor advisories

CVE-2025-4673 Red Hat Product Security193 products fixed · 396 known affected
net/http: Sensitive headers not cleared on cross-origin redirect in net/http
cryostat/cryostat-storage-rhel9 as a component of Cryostat 4 · custom-metrics-autoscaler/custom-metrics-autoscaler-rhel8 as a component of Custom Metric Autoscaler operator for Red Hat Openshift · dvo/deployment-validation-rhel8-operator as a component of Deployment Validation Operator · +393 more
RHSA-2026:19350 Red Hat Product Security13 products fixed
Red Hat Security Advisory: git-lfs security update
RHSA-2025:16432 Red Hat Product Security5 products fixed
Red Hat Security Advisory: opentelemetry-collector security update
RHSA-2025:15887 Red Hat Product Security5 products fixed
Red Hat Security Advisory: opentelemetry-collector security update
RHSA-2025:15406 Red Hat Product Security5 products fixed
Red Hat Security Advisory: opentelemetry-collector security update
RHSA-2025:10823 Red Hat Product Security24 products fixed
Red Hat Security Advisory: Red Hat build of Tempo 3.6.1 release

4 more advisories

Full record on NVD

Fix

Update golang to 1.24.4 · 1.23.10
Vendor fix Red Hat Product Security RHSA-2026:19350 · 13 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Vendor fix Red Hat Product Security RHSA-2025:10823 · 24 productsFor details on how to apply this update, refer to: https://docs.redhat.com/en/documentation/openshift_container_platform/latest/html/operators/administrator-tasks#olm-upgrading-operators
Workaround from the vendor Red Hat Product Security RHSA-2026:19350 · 13 productsMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2025-06-11
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.16.82025-06-11
FIRST EPSSEPSS score0.7 %2026-10-22
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Published: 2025-06-11
Last Modified: 2026-06-17
NVD status: Deferred

Frequently asked questions

What is CVE-2025-4673?

Proxy-Authorization and Proxy-Authenticate headers persisted on cross-origin redirects potentially leaking sensitive information.

Is CVE-2025-4673 actively exploited?

Active exploitation of CVE-2025-4673 has not been confirmed. Its EPSS score was 0.7% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-4673?

CVE-2025-4673 has a CVSS v3 base score of 6.8 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N.

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