Apache Software FoundationCVE-2026-58186
Apache Traffic Server: improper input validation
High8.2CVE-2026-58186 · Published Jul 29, 2026 · updated Oct 1, 2026
The Apache Traffic Server webp_transform plugin can decode unsafely and serve mislabeled, cacheable responses. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Apache Traffic Server Product | >= 8.0.0, <= 8.1.11 | No fix yet |
| >= 9.0.0, <= 9.2.14 | No fix yet | |
| >= 10.0.0, <= 10.1.3 | No fix yet |
Details and references
- CVSS 4.0
- CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-20
More Apache Software Foundation advisories
All Apache Software Foundation| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Jul 29 | Apache Traffic Server: out-of-bounds write | High8.4 | No fix yet |
| Jul 29 | Apache Traffic Server: server-side request forgery | High8.2 | No fix yet |
| Jul 29 | Apache Traffic Server updates the HTTP/2 HPACK dynamic table before confirming... | Medium6.3 | No fix yet |
| Jul 29 | Apache Traffic Server: stack buffer overflow | High8.2 | No fix yet |
| Jul 29 | Apache Traffic Server: resource exhaustion | High8.2 | No fix yet |
| Jul 29 | Apache Traffic Server: improper input validation | High8.2 | No fix yet |