CVE-2023-27371
GNU libmicrohttpd before 0.9.76 allows remote DoS (Denial of Service) due to improper parsing of a multipart/form-data boundary in the postprocessor.c MHD_create_post_processor() method.
Does this matter?
Lower severity and a low EPSS score (1.25%). Track it; it rarely justifies an emergency change on its own.
Description
GNU libmicrohttpd before 0.9.76 allows remote DoS (Denial of Service) due to improper parsing of a multipart/form-data boundary in the postprocessor.c MHD_create_post_processor() method. This allows an attacker to remotely send a malicious HTTP POST packet that includes one or more '\0' bytes in a multipart/form-data boundary field, which - assuming a specific heap layout - will result in an out-of-bounds read and a crash in the find_boundary() function.
- CVSS 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.25% probability · 69th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- gnu/libmicrohttpd
- Source
- cve@mitre.org
EPSS 1.3% since 10 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://git.gnunet.org/libmicrohttpd.git/commit/?id=6d6846e20bfdf4b3eb1b592c97520a532f724238Patch
- https://github.com/0xhebi/CVEs/tree/main/GNU%20LibmicrohttpdExploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/03/msg00029.html
- https://lists.gnu.org/archive/html/libmicrohttpd/2023-02/msg00000.htmlMailing List
- https://git.gnunet.org/libmicrohttpd.git/commit/?id=6d6846e20bfdf4b3eb1b592c97520a532f724238Patch
- https://github.com/0xhebi/CVEs/tree/main/GNU%20LibmicrohttpdExploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/03/msg00029.html
- https://lists.gnu.org/archive/html/libmicrohttpd/2023-02/msg00000.htmlMailing List
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.