CVE-2026-58156
Low
No strong exploitation signal.
CVSS base
4.9
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
EPSS — probability of exploitation (30 days)
0.2%
16.5th percentile
CISA KEV
Not listed
Weakness / dates
CWE-863
Published 2026-07-29 · modified 2026-08-03
CVSS breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
| Attack Vector | N | Network |
| Attack Complexity | H | High |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | C | Changed |
| Confidentiality | L | Low |
| Integrity | L | Low |
| Availability | N | None |
Timeline
- 2026-07-29 — Published (NVD)
- 2026-08-03 — Last modified (NVD)
Description
Apache Traffic Server mis-parses ports in URLs and userinfo, allowing port-based access-control bypass. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, 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.