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curl CVEs

If you find or simply suspect a security problem in curl or libcurl, please file a detailed report on our hackerone page and tell.

See also the Vulnerabilities Table to see what versions that are vulnerable to what flaws.

Published vulnerabilities

All | Medium+ | High+ | Critical

(The table below has been filtered to show High+ severity)

#	S	W	C	Vulnerability	Published	First	Last	Awarded
147	H		C	CVE-2023-38545: SOCKS5 heap buffer overflow	2023-10-11	7.69.0	8.3.0	4660 USD
103	H		C	CVE-2021-22901: TLS session caching disaster	2021-05-26	7.75.0	7.76.1	2000 USD
90	H			CVE-2019-5443: Windows OpenSSL engine code injection	2019-06-24	7.44.0	7.65.1	200 USD
86	H		C	CVE-2019-3822: NTLMv2 type-3 header stack buffer overflow	2019-02-06	7.36.0	7.63.0
81	H		C	CVE-2018-14618: NTLM password overflow via integer overflow	2018-09-05	7.15.4	7.61.0
80	H		C	CVE-2018-0500: SMTP send heap buffer overflow	2018-07-11	7.54.1	7.60.0
79	H		C	CVE-2018-1000300: FTP shutdown response buffer overflow	2018-05-16	7.54.1	7.59.0
75	H		C	CVE-2018-1000120: FTP path trickery leads to NIL byte out of bounds write	2018-03-14	7.12.3	7.58.0
72	H		C	CVE-2017-8818: SSL out of buffer access	2017-11-29	7.56.0	7.56.1
66	H		C	CVE-2017-1000100: TFTP sends more than buffer size	2017-08-09	7.15.0	7.54.1
64	H		C	CVE-2017-9502: URL file scheme drive letter buffer overflow	2017-06-14	7.53.0	7.54.0
63	H			CVE-2017-7468: TLS session resumption client cert bypass (again)	2017-04-19	7.52.0	7.53.1
60	H			CVE-2016-9594: uninitialized random	2016-12-23	7.52.0	7.52.0
56	H			CVE-2016-8615: cookie injection for other servers	2016-11-02	4.9	7.50.3
52	H		C	CVE-2016-8619: double free in krb5 code	2016-11-02	7.3	7.50.3
48	H	lib	C	CVE-2016-8623: Use after free via shared cookies	2016-11-02	7.10.7	7.50.3
46	H			CVE-2016-8625: IDNA 2003 makes curl use wrong host	2016-11-02	7.12.0	7.50.3
44	H			CVE-2016-7141: Incorrect reuse of client certificates	2016-09-07	7.19.6	7.50.1
43	H			CVE-2016-5419: TLS session resumption client cert bypass	2016-08-03	5.0	7.50.0
41	H	lib	C	CVE-2016-5421: use of connection struct after free	2016-08-03	7.32.0	7.50.0
40	H			CVE-2016-4802: Windows DLL hijacking	2016-05-30	7.11.1	7.49.0
39	H			CVE-2016-3739: TLS certificate check bypass with mbedTLS/PolarSSL	2016-05-18	7.21.0	7.48.0
38	H	tool		CVE-2016-0754: remote filename path traversal in curl tool for Windows	2016-01-27	4.0	7.46.0
36	H		C	CVE-2015-3237: SMB send off unrelated memory contents	2015-06-17	7.40.0	7.42.1
35	H			CVE-2015-3236: lingering HTTP credentials in connection re-use	2015-06-17	7.40.0	7.42.1
34	H			CVE-2015-3153: sensitive HTTP server headers also sent to proxies	2015-04-29	4.0	7.42.0
28	H			CVE-2014-8150: URL request injection	2015-01-08	6.0	7.39.0
26	H			CVE-2014-3620: cookie leak for TLDs	2014-09-10	7.31.0	7.37.1
17	H	lib	C	CVE-2013-2174: URL decode buffer boundary flaw	2013-06-22	7.7	7.30.0
16	H			CVE-2013-1944: cookie domain tailmatch	2013-04-12	4.7	7.29.0
15	C		C	CVE-2013-0249: SASL buffer overflow	2013-02-06	7.26.0	7.28.1
14	H			CVE-2011-3389: SSL CBC IV vulnerability	2012-01-24	7.10.6	7.23.1
13	H			CVE-2012-0036: URL sanitization vulnerability	2012-01-24	7.20.0	7.23.1
11	H	tool		CVE-2010-3842: local file overwrite	2010-10-13	7.20.0	7.21.1
10	H	lib		CVE-2010-0734: data callback excessive length	2010-02-09	7.10.5	7.19.7
9	H		C	CVE-2009-2417: embedded zero in cert name	2009-08-12	7.4	7.19.5
6	H		C	CVE-2006-1061: TFTP Packet Buffer Overflow	2006-03-20	7.15.0	7.15.2
5	H		C	CVE-2005-4077: URL Buffer Overflow	2005-12-07	7.11.2	7.15.0
4	H		C	CVE-2005-3185: NTLM Buffer Overflow	2005-10-13	7.10.6	7.14.1
3	H		C	CVE-2005-0490: Authentication Buffer Overflows	2005-02-21	7.3	7.13.0
2	H			CVE-2003-1605: Proxy Authentication Header Information Leakage	2003-08-03	4.5	7.10.6
1	C		C	CVE-2000-0973: FTP Server Response Buffer Overflow	2000-10-13	6.0	7.4

C mistakes

Flaws listed as "C mistakes" are vulnerabilities that we deem are likely to not have happened should we have used a memory-safe language rather than C. The C mistakes are divided into the following areas: OVERFLOW, OVERREAD, DOUBLE_FREE, USE_AFTER_FREE, NULL_MISTAKE, UNINIT and BAD_FREE.

Retracted security vulnerabilities

Issues no longer considered curl security problems:

CVE-2019-15601 - SMB access smuggling via FILE URL on Windows
CVE-2023-32001 - fopen race condition

Bogus security vulnerabilities

Issues filed by others that are plain lies:

curl vulnerability data

vuln.csv and vuln.json provide info about all vulnerabilities in machine friendly formats.

Each vulnerability is also provided as a single JSON that you can access at "https://curl.se/docs/$CVE.json" - replace $CVE with the actual curl CVE Id.

The JSON output follows the Open Source Vulnerability format