PatchTheCVECVE-2019-11072: lighttpd before 1.4.54 has a signed integer overflow, which might allow remote attackers to cause a denial of
CVE-2019-11072 is a critical-severity flaw (CVSS 9.8) affecting lighttpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
lighttpd before 1.4.54 has a signed integer overflow, which might allow remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a malicious HTTP GET request, as demonstrated by mishandling of /%2F? in burl_normalize_2F_to_slash_fix in burl.c. NOTE: The developer states "The feature which can be abused to cause the crash is a new feature in lighttpd 1.4.50, and is not enabled by default. It m
Why this priority
- Critical severity
- EPSS top 1%: very likely to be exploited
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 73.8% (top 1%) |
| CISA exploited list | No |
| Weakness | CWE-190 |
| Published | 2019-04-10 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2019-11072?
lighttpd: upgrade to newer than 1.4.53. Exact commands for each OS are on this page.
Is CVE-2019-11072 being exploited?
CVE-2019-11072 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2019-11072 affect?
CVE-2019-11072 affects lighttpd. Severity is critical (CVSS 9.8). lighttpd before 1.4.54 has a signed integer overflow, which might allow remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a malicious HTTP GET request, as demonstrated by mishand
How urgent is CVE-2019-11072?
Priority 69/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action
Software pages
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