Proxy credential disclosure via authority-agnostic authentication cache
Published Jul 21, 2026 · Updated Jul 21, 2026
Information disclosure in libsoup3 on Red Hat Enterprise Linux 10 allows remote attackers to read cached proxy credentials. SoupAuthManager reuses a cached Proxy-Authorization header without binding the credentials to the proxy authority, so a later proxy receives the prior proxy's secret. Exploitation requires privileged influence over proxy selection and a client request after the switch; disclosure is limited to cached proxy credentials.
Summary
What happened
Information disclosure in libsoup3 on Red Hat Enterprise Linux 10 allows remote attackers to read cached proxy credentials. SoupAuthManager reuses a cached Proxy-Authorization header without binding the credentials to the proxy authority, so a later proxy receives the prior proxy's secret. Exploitation requires privileged influence over proxy selection and a client request after the switch; disclosure is limited to cached proxy credentials.
The record
- CVE
- CVE-2026-12547
- Published
- Jul 21, 2026
- Updated
- Jul 21, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Enterprise Linux 10
- Classifications
- T1557
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Jul 21, 2026CVE publishedPublication date reported by the CVE source.
- Jul 21, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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