Medium severity5.3NVD Advisory· Published Apr 1, 2021· Updated Jun 17, 2026
CVE-2021-22876
CVE-2021-22876
Description
curl 7.1.1 to and including 7.75.0 is vulnerable to an "Exposure of Private Personal Information to an Unauthorized Actor" by leaking credentials in the HTTP Referer: header. libcurl does not strip off user credentials from the URL when automatically populating the Referer: HTTP request header field in outgoing HTTP requests, and therefore risks leaking sensitive data to the server that is the target of the second HTTP request.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
33- curl/curldescription
- osv-coords30 versionspkg:rpm/almalinux/curlpkg:rpm/almalinux/libcurlpkg:rpm/almalinux/libcurl-develpkg:rpm/almalinux/libcurl-minimalpkg:rpm/opensuse/curl&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/curl&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/curl-mini&distro=openSUSE%20Leap%2015.2pkg:rpm/suse/curl&distro=SUSE%20Enterprise%20Storage%206pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOSpkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSSpkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Micro%205.0pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCLpkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg:rpm/suse/curl&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/curl&distro=SUSE%20Manager%20Proxy%204.0pkg:rpm/suse/curl&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0pkg:rpm/suse/curl&distro=SUSE%20Manager%20Server%204.0pkg:rpm/suse/curl&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/curl&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209pkg:rpm/suse/curl-openssl1&distro=SUSE%20Linux%20Enterprise%20Server%2011-SECURITY
< 7.61.1-22.el8+ 29 more
- (no CPE)range: < 7.61.1-22.el8
- (no CPE)range: < 7.61.1-22.el8
- (no CPE)range: < 7.61.1-22.el8
- (no CPE)range: < 7.61.1-22.el8
- (no CPE)range: < 7.66.0-lp152.3.15.1
- (no CPE)range: < 7.79.1-1.1
- (no CPE)range: < 7.66.0-lp152.3.15.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.66.0-4.14.1
- (no CPE)range: < 7.66.0-4.14.1
- (no CPE)range: < 7.60.0-4.20.1
- (no CPE)range: < 7.60.0-11.15.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-4.20.1
- (no CPE)range: < 7.60.0-11.15.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-11.15.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-3.42.1
- (no CPE)range: < 7.60.0-4.20.1
- (no CPE)range: < 7.60.0-4.20.1
- (no CPE)range: < 7.37.0-70.60.1
Patches
Vulnerability mechanics
References
10- cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfnvdPatchThird Party Advisory
- curl.se/docs/CVE-2021-22876.htmlnvdPatchVendor Advisory
- hackerone.com/reports/1101882nvdExploitIssue TrackingPatchThird Party Advisory
- lists.debian.org/debian-lts-announce/2021/05/msg00019.htmlnvdMailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2ZC5BMIOKLBQJSFCHEDN2G2C2SH274BP/nvdMailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITVWPVGLFISU5BJC2BXBRYSDXTXE2YGC/nvdMailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQUIOYX2KUU6FIUZVB5WWZ6JHSSYSQWJ/nvdMailing ListThird Party Advisory
- security.gentoo.org/glsa/202105-36nvdThird Party Advisory
- security.netapp.com/advisory/ntap-20210521-0007/nvdThird Party Advisory
- www.oracle.com//security-alerts/cpujul2021.htmlnvdThird Party Advisory
News mentions
0No linked articles in our index yet.