CVE-2026-41920: apache software foundation apache traffic server Improper Access Control
CVSS: 9.3v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2026-41920DEBIAN-CVE-2026-41920
Published 29-07-2026Last modified 29-07-2026
Vulnerability summary
CVE-2026-41920 is a critical (CVSS 9.3) Improper Access Control vulnerability in apache software foundation apache traffic server. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 43.7% of scored vulnerabilities.
CVSS score
9.3/10
010
Critical · v3.1 (CVE.org)EPSS score
0.53%
0%100%
Low · +0.22 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 29-07-2026PublishedVulnerability first disclosed.
- 29-07-2026Last modifiedVulnerability information updated.
Description
Improper Access Control vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 9.0.0 through 9.1.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.1.15 or 10.1.4, which fixes the issue.
CVSS metrics
7 scores · 4 sources · 2 versionsHigh 7.0Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:NSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated7.0HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
- OSV · DebianEcosystem advisory · calculated7.0HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/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
- NVDNIST7.0HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/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
Critical 9.3Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated9.3CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
- NVDNIST9.3CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
EPSS trend
Probability
0.53%
Chance of exploitation in the next 30 days
Percentile
44%
Versus all other CVEs
30-day change
+0.22 pp
From 0.31% on 18-09-2026
18-09-202618-10-2026
EPSS score0.53%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Apache1 product
- traffic_server≥ 9.0.0, < 9.2.15 | ≥ 10.0.0, < 10.1.4
Apache software foundation1 product
- apache traffic server≥ 9.0.0, ≤ 9.1.14 | ≥ 10.0.0, ≤ 10.1.3
Debian1 product
- trafficserverAll versions (No fix recorded)
Ubuntu1 product
- trafficserverAll versions (No fix recorded)
4 vendors · 4 products
