CVE-2026-58177: apache software foundation apache traffic server Out-of-bounds Write
CVSS: 9.8v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2026-58177DEBIAN-CVE-2026-58177
Published 29-07-2026Last modified 29-07-2026
Vulnerability summary
CVE-2026-58177 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in apache software foundation apache traffic server. EPSS estimates a 0.59% chance of exploitation in the next 30 days, higher than 47% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
0.59%
0%100%
Low · +0.26 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
The Apache Traffic Server Cripts framework has out-of-bounds writes, path traversal, and use-after-free errors. This issue affects Apache Traffic Server: from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 10.1.4, which fix the issue.
CVSS metrics
7 scores · 4 sources · 2 versionsHigh 8.3Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:L/SI:L/SA:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated8.3HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:L/SI:L/SA:N
- NVDNIST8.3HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:L/SI:L/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 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSources4 sources · 8.1–9.8
- CVE.orgCNA8.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.59%
Chance of exploitation in the next 30 days
Percentile
47%
Versus all other CVEs
30-day change
+0.26 pp
From 0.33% on 20-09-2026
20-09-202620-10-2026
EPSS score0.59%
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≥ 10.0.0, < 10.1.4
Apache software foundation1 product
- apache traffic server≥ 10.0.0, ≤ 10.1.3
Debian1 product
- trafficserverAll versions (No fix recorded)
Ubuntu1 product
- trafficserverAll versions (No fix recorded)
4 vendors · 4 products
