Memory corruption via unsafe MIME and header parsing
Published Jul 29, 2026 · Updated Jul 29, 2026
Out-of-bounds writes in MIME and HTTP header parsing in Apache Traffic Server allow remote attackers to corrupt process memory. Apache has not published the precise parser functions, malformed-header condition, or exploit path that triggers the write or integer overflow. No authentication or user interaction is required, but exploitation depends on an unspecified runtime condition and can disclose or alter data or crash the server.
Summary
What happened
Out-of-bounds writes in MIME and HTTP header parsing in Apache Traffic Server allow remote attackers to corrupt process memory. Apache has not published the precise parser functions, malformed-header condition, or exploit path that triggers the write or integer overflow. No authentication or user interaction is required, but exploitation depends on an unspecified runtime condition and can disclose or alter data or crash the server.
The record
- CVE
- CVE-2026-58154
- Published
- Jul 29, 2026
- Updated
- Jul 29, 2026
- Vendor
- The Apache Software Foundation
- Product
- Apache Traffic Server
- Classifications
- CWE-787, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 29, 2026CVE publishedPublication date reported by the CVE source.
- Jul 29, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.0 <=10.1.3
- Affected versionversion=8.0.0 <=8.1.9
- Affected versionversion=9.0.0 <=9.2.14
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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