CVE catalog
CVE-2026-93894
In Vinyl Cache before 9.0,2, workspace buffer overflow vulnerability was found in the .upper() and .lower() string type methods of VCL. This can be used as a remote denial of service (DoS) vector to m
- Severity
- Low · CVSS 2.3
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/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:N/R:A/V:D/RE:L/U:Clear - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.36% · Oct 25, 2026
In Vinyl Cache before 9.0,2, workspace buffer overflow vulnerability was found in the .upper() and .lower() string type methods of VCL. This can be used as a remote denial of service (DoS) vector to make the child process segfault or assert, and then restart. Effectively exploiting this vulnerability requires prior knowledge about the VCL in use and the ability to craft a request that contains a string that is long enough to fill the remaining workspace at the call site while staying under the different request size limits (http_req_size, http_req_hdr_len, etc.).
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | varnish | trixie | 7.7.0-3+deb13u1 | vulnerable |
| Debian | varnish | trixie-security | 7.7.0-3+deb13u2 | fixed |
| Debian | varnish | bookworm | 7.1.1-2+deb12u1 | vulnerable |
| Debian | varnish | bookworm-security | 7.1.1-2+deb12u1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | varnish | source | trixie | 7.7.0-3+deb13u2 | not yet assigned | Not reported | Not reported |
| Debian | varnish | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
Notes
[bookworm] varnish: Minor issue, DoS
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libvarnishapi3]Affected
Source package: [varnish]
Details (4)
7.1.1-2+deb12u1· amd64 · bookwormAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
7.1.1-2+deb12u1· arm64 · bookwormAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
7.1.1-2+deb12u1· amd64 · bookworm-securityAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
7.1.1-2+deb12u1· arm64 · bookworm-securityAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
- [libvarnishapi-dev]Affected
Source package: [varnish]
Details (4)
7.1.1-2+deb12u1· amd64 · bookwormAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
7.1.1-2+deb12u1· arm64 · bookwormAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
7.1.1-2+deb12u1· amd64 · bookworm-securityAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
7.1.1-2+deb12u1· arm64 · bookworm-securityAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
- [varnish]Affected
Details (4)
7.1.1-2+deb12u1· amd64 · bookwormAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
7.1.1-2+deb12u1· arm64 · bookwormAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
7.1.1-2+deb12u1· amd64 · bookworm-securityAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
7.1.1-2+deb12u1· arm64 · bookworm-securityAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
- [varnish-doc]Affected
Source package: [varnish]
Details (4)
7.1.1-2+deb12u1· all · bookwormAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
7.1.1-2+deb12u1· all · bookwormAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
7.1.1-2+deb12u1· all · bookworm-securityAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
7.1.1-2+deb12u1· all · bookworm-securityAffected
nvd · varnish · debian · bookworm; nvd · varnish · debian · 12
[Debian 13 (Trixie)]
- [libvarnishapi3]Affected
Source package: [varnish]
Details (5)
7.7.0-3+deb13u1· amd64 · trixieAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u1· arm64 · trixieAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u1· amd64 · trixie-security · Historical versionAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u1· arm64 · trixie-securityAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u2· amd64 · trixie-securityFixed · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
- [libvarnishapi-dev]Affected
Source package: [varnish]
Details (5)
7.7.0-3+deb13u1· amd64 · trixieAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u1· arm64 · trixieAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u1· amd64 · trixie-security · Historical versionAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u1· arm64 · trixie-securityAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u2· amd64 · trixie-securityFixed · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
- [varnish]Affected
Details (5)
7.7.0-3+deb13u1· amd64 · trixieAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u1· arm64 · trixieAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u1· amd64 · trixie-security · Historical versionAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u1· arm64 · trixie-securityAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u2· amd64 · trixie-securityFixed · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
- [varnish-doc]Affected
Source package: [varnish]
Details (5)
7.7.0-3+deb13u1· all · trixieAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u1· all · trixieAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u1· all · trixie-security · Historical versionAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u1· all · trixie-securityAffected · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
7.7.0-3+deb13u2· all · trixie-securityFixed · Fixed:
7.7.0-3+deb13u2nvd · varnish · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-93894]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-93894]
- [https://security-tracker.debian.org/tracker/CVE-2026-93894]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3440.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]