CVE-2018-6758: unbit uwsgi Out-of-bounds Write
Vulnerability summary
CVE-2018-6758 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in unbit uwsgi. EPSS estimates a 2.05% chance of exploitation in the next 30 days, higher than 81.2% of scored vulnerabilities.
Severe, CVSS 9.8 (NVD); no exploitation reported by the 5 checked sources; EPSS 2% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Timeline
- 06-02-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
The uwsgi_expand_path function in core/utils.c in Unbit uWSGI through 2.0.15 has a stack-based buffer overflow via a large directory length.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
2.05%
Chance of exploitation in the next 30 days
Percentile
81%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.05% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine1 product
- uwsgi< 2.0.16-r0
Debian1 product
- uwsgi< 1.2.3+dfsg-5+deb7u2 | < 2.0.15-10.2
Opensuse1 product
- uwsgi&distro=openSUSE Tumbleweed< 2.0.19.1-3.10
Ubuntu1 product
- uwsgi< 1.9.17.1-5ubuntu0.1 | < 2.0.12-5ubuntu3.2
Unbit1 product
- uwsgi≤ 2.0.15
5 vendors · 5 products
References
8 links
lists.debian.org/debian-lts-announce/2018/02/msg00010.htmlMailing ListX Refsource MLISTThird Party Advisory- github.com/unbit/uwsgi/commit/cb4636f7c0af2e97a4eef7a3cdcbd85a71247bfeX Refsource MISCPatchVendor AdvisoryREPORT