CVE catalog
CVE-2016-4864
h2o: CVE-2016-4864
- Severity
- Low
- Source
- [NVD] · [CVE record]
- EPSS
- 1.80% · Oct 25, 2026
H2O versions 2.0.3 and earlier and 2.1.0-beta2 and earlier allows remote attackers to cause a denial-of-service (DoS) via format string specifiers in a template file via fastcgi, mruby, proxy, redirect or reproxy.
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 | h2o | bookworm | 2.2.5+dfsg2-7 | not affected |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | h2o | source | bookworm | Not affected | unimportant | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [h2o]Not affected
Details (2)
2.2.5+dfsg2-7· amd64 · bookwormNot affected
dsa · h2o · debian · bookworm
2.2.5+dfsg2-7· arm64 · bookwormNot affected
dsa · h2o · debian · bookworm
- [h2o-doc]Not affected
Source package: [h2o]
Details (2)
2.2.5+dfsg2-7· all · bookwormNot affected
dsa · h2o · debian · bookworm
2.2.5+dfsg2-7· all · bookwormNot affected
dsa · h2o · debian · bookworm
- [libh2o0.13]Not affected
Source package: [h2o]
Details (2)
2.2.5+dfsg2-7· amd64 · bookwormNot affected
dsa · h2o · debian · bookworm
2.2.5+dfsg2-7· arm64 · bookwormNot affected
dsa · h2o · debian · bookworm
- [libh2o-dev]Not affected
Source package: [h2o]
Details (2)
2.2.5+dfsg2-7· amd64 · bookwormNot affected
dsa · h2o · debian · bookworm
2.2.5+dfsg2-7· arm64 · bookwormNot affected
dsa · h2o · debian · bookworm
- [libh2o-dev-common]Not affected
Source package: [h2o]
Details (2)
2.2.5+dfsg2-7· all · bookwormNot affected
dsa · h2o · debian · bookworm
2.2.5+dfsg2-7· all · bookwormNot affected
dsa · h2o · debian · bookworm
- [libh2o-evloop0.13]Not affected
Source package: [h2o]
Details (2)
2.2.5+dfsg2-7· amd64 · bookwormNot affected
dsa · h2o · debian · bookworm
2.2.5+dfsg2-7· arm64 · bookwormNot affected
dsa · h2o · debian · bookworm
- [libh2o-evloop-dev]Not affected
Source package: [h2o]
Details (2)
2.2.5+dfsg2-7· amd64 · bookwormNot affected
dsa · h2o · debian · bookworm
2.2.5+dfsg2-7· arm64 · bookwormNot affected
dsa · h2o · debian · bookworm
Observed: