# Haxx vulnerabilities

Source: https://junglewise.ai/threats/vendors/haxx  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/haxx.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 28 vulnerabilities in Haxx: 0 in the last 7 days and 9 in the last 90 days, 2 of them critical and 0 exploited in the wild. The most recent, CVE-2026-82209, was published on 6 September 2026. Nothing was published in the last eight weeks. 2 technologies have a page of their own.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 9
- All time: 28 (2 critical, 0 exploited in the wild)

## About Haxx

Haxx is a Swedish organization and web domain associated with the development of the curl data transfer tool.

## Latest Haxx vulnerabilities

- [CVE-2026-82209: curl Public Suffix List domain boundary check bypass in cookie handling](https://junglewise.ai/threats/cve-2026-82209-curl-public-suffix-list-domain-boundary-check-bypass-in-cookie) (high, CVSS 8.2, published 6 Sep 2026)
- [CVE-2026-82208: curl libcurl certificate validation bypass in wolfSSL backend](https://junglewise.ai/threats/cve-2026-82208-curl-libcurl-certificate-validation-bypass-in-wolfssl-backend) (high, CVSS 7.5, published 6 Sep 2026)
- [CVE-2026-80255: curl secure cookie attribute bypass with tab](https://junglewise.ai/threats/cve-2026-80255-curl-secure-cookie-attribute-bypass-with-tab) (high, CVSS 7.5, published 6 Sep 2026)
- [CVE-2026-80231: curl HTTPS connection reuse with mismatched CA store settings](https://junglewise.ai/threats/cve-2026-80231-curl-https-connection-reuse-with-mismatched-ca-store-settings) (high, CVSS 7.5, published 6 Sep 2026)
- [CVE-2026-80230: curl public key pinning bypass with disabled peer verification](https://junglewise.ai/threats/cve-2026-80230-curl-public-key-pinning-bypass-with-disabled-peer-verification) (high, CVSS 7.5, published 6 Sep 2026)
- [CVE-2026-80229: curl OpenSSL provider use-after-free in TLS connections](https://junglewise.ai/threats/cve-2026-80229-curl-openssl-provider-use-after-free-in-tls-connections) (high, CVSS 7.5, published 6 Sep 2026)
- [CVE-2026-19931: curl Negotiate authentication connection reuse](https://junglewise.ai/threats/cve-2026-19931-curl-negotiate-authentication-connection-reuse) (critical, CVSS 9.8, published 6 Sep 2026)
- [CVE-2026-18924: curl libcurl HTTP/2 server push use-after-free](https://junglewise.ai/threats/cve-2026-18924-curl-libcurl-http-2-server-push-use-after-free) (critical, CVSS 9.1, published 6 Sep 2026)
- [CVE-2026-13608: libcurl SASL negotiation authentication bypass in LDAP](https://junglewise.ai/threats/cve-2026-13608-libcurl-sasl-negotiation-authentication-bypass-in-ldap) (high, CVSS 7.4, published 6 Sep 2026)
- [CVE-2026-7168: Successfully using libcurl to do a transfer over a specific HTTP proxy (`proxyA`) with **Digest** authentication and…](https://junglewise.ai/threats/cve-2026-7168-curl-libcurl-digest-auth-state-leak-when-changing-proxies) (medium, CVSS 5.3, published 13 May 2026)
- [CVE-2026-6429: When asked to both use a `.netrc` file for credentials and to follow HTTP redirects, libcurl could leak the password…](https://junglewise.ai/threats/cve-2026-6429-curl-libcurl-netrc-credential-leak-in-redirected-proxy-connections) (medium, CVSS 5.3, published 13 May 2026)
- [CVE-2026-6276: Using libcurl, when a custom `Host:` header is first set for an HTTP request and a second request is subsequently done…](https://junglewise.ai/threats/cve-2026-6276-curl-libcurl-cookie-leak-via-stale-custom-host-header) (high, CVSS 7.5, published 13 May 2026)
- [CVE-2026-6253: curl might erroneously pass on credentials for a first proxy to a second proxy. This can happen when the following…](https://junglewise.ai/threats/cve-2026-6253-curl-proxy-credentials-leak-during-redirect-to-different-proxy) (medium, CVSS 5.9, published 13 May 2026)
- [CVE-2026-5773: libcurl might in some circumstances reuse the wrong connection for SMB(S) transfers. libcurl features a pool of recent…](https://junglewise.ai/threats/cve-2026-5773-curl-libcurl-incorrect-connection-reuse-in-smb-transfers) (high, CVSS 7.5, published 13 May 2026)
- [CVE-2026-5545: libcurl might in some circumstances reuse the wrong connection when asked to do an authenticated HTTP(S) request after…](https://junglewise.ai/threats/cve-2026-5545-curl-incorrect-connection-reuse-in-negotiate-authentication) (medium, CVSS 6.5, published 13 May 2026)
- [CVE-2026-4873: A vulnerability exists where a connection requiring TLS incorrectly reuses an existing unencrypted connection from the same…](https://junglewise.ai/threats/cve-2026-4873-curl-connection-reuse-ignores-tls-requirement-in-email-protocols) (medium, CVSS 5.9, published 13 May 2026)
- [CVE-2026-3784: curl wrong proxy connection reuse with credentials](https://junglewise.ai/threats/cve-2026-3784-curl-wrong-proxy-connection-reuse-with-credentials) (medium, CVSS 6.5, published 11 Mar 2026)
- [CVE-2025-15224: curl libssh key passphrase bypass without agent set](https://junglewise.ai/threats/cve-2025-15224-curl-libssh-key-passphrase-bypass-without-agent-set) (low, CVSS 3.1, published 8 Jan 2026)
- [CVE-2025-15079: curl libssh global known_hosts override in SFTP/SCP](https://junglewise.ai/threats/cve-2025-15079-curl-libssh-global-known-hosts-override-in-sftp-scp) (medium, CVSS 5.3, published 8 Jan 2026)
- [CVE-2025-14819: curl libcurl certificate validation bypass in OpenSSL backend](https://junglewise.ai/threats/cve-2025-14819-curl-libcurl-certificate-validation-bypass-in-openssl-backend) (medium, CVSS 5.3, published 8 Jan 2026)
- [CVE-2025-14524: curl bearer token leak on cross-protocol redirect](https://junglewise.ai/threats/cve-2025-14524-curl-bearer-token-leak-on-cross-protocol-redirect) (medium, CVSS 5.3, published 8 Jan 2026)
- [CVE-2025-14017: curl LDAPS thread-unsafe TLS option handling](https://junglewise.ai/threats/cve-2025-14017-curl-ldaps-thread-unsafe-tls-option-handling) (medium, CVSS 6.3, published 8 Jan 2026)
- [CVE-2025-13034: curl certificate pinning bypass in QUIC with GnuTLS](https://junglewise.ai/threats/cve-2025-13034-curl-certificate-pinning-bypass-in-quic-with-gnutls) (medium, CVSS 5.9, published 8 Jan 2026)
- [CVE-2025-10966: curl missing SFTP host verification in wolfSSH backend](https://junglewise.ai/threats/cve-2025-10966-curl-missing-sftp-host-verification-in-wolfssh-backend) (medium, CVSS 4.3, published 7 Nov 2025)
- [CVE-2025-9086: curl out-of-bounds read in cookie path comparison](https://junglewise.ai/threats/cve-2025-9086-curl-out-of-bounds-read-in-cookie-path-comparison) (high, CVSS 7.5, published 12 Sep 2025)

## Most severe Haxx vulnerabilities

- [CVE-2026-19931: curl Negotiate authentication connection reuse](https://junglewise.ai/threats/cve-2026-19931-curl-negotiate-authentication-connection-reuse) (critical, CVSS 9.8, published 6 Sep 2026)
- [CVE-2026-18924: curl libcurl HTTP/2 server push use-after-free](https://junglewise.ai/threats/cve-2026-18924-curl-libcurl-http-2-server-push-use-after-free) (critical, CVSS 9.1, published 6 Sep 2026)
- [CVE-2026-82209: curl Public Suffix List domain boundary check bypass in cookie handling](https://junglewise.ai/threats/cve-2026-82209-curl-public-suffix-list-domain-boundary-check-bypass-in-cookie) (high, CVSS 8.2, published 6 Sep 2026)
- [CVE-2026-80231: curl HTTPS connection reuse with mismatched CA store settings](https://junglewise.ai/threats/cve-2026-80231-curl-https-connection-reuse-with-mismatched-ca-store-settings) (high, CVSS 7.5, published 6 Sep 2026)
- [CVE-2026-80229: curl OpenSSL provider use-after-free in TLS connections](https://junglewise.ai/threats/cve-2026-80229-curl-openssl-provider-use-after-free-in-tls-connections) (high, CVSS 7.5, published 6 Sep 2026)
- [CVE-2026-80255: curl secure cookie attribute bypass with tab](https://junglewise.ai/threats/cve-2026-80255-curl-secure-cookie-attribute-bypass-with-tab) (high, CVSS 7.5, published 6 Sep 2026)
- [CVE-2026-5773: libcurl might in some circumstances reuse the wrong connection for SMB(S) transfers. libcurl features a pool of recent…](https://junglewise.ai/threats/cve-2026-5773-curl-libcurl-incorrect-connection-reuse-in-smb-transfers) (high, CVSS 7.5, published 13 May 2026)
- [CVE-2026-80230: curl public key pinning bypass with disabled peer verification](https://junglewise.ai/threats/cve-2026-80230-curl-public-key-pinning-bypass-with-disabled-peer-verification) (high, CVSS 7.5, published 6 Sep 2026)
- [CVE-2026-82208: curl libcurl certificate validation bypass in wolfSSL backend](https://junglewise.ai/threats/cve-2026-82208-curl-libcurl-certificate-validation-bypass-in-wolfssl-backend) (high, CVSS 7.5, published 6 Sep 2026)
- [CVE-2026-6276: Using libcurl, when a custom `Host:` header is first set for an HTTP request and a second request is subsequently done…](https://junglewise.ai/threats/cve-2026-6276-curl-libcurl-cookie-leak-via-stale-custom-host-header) (high, CVSS 7.5, published 13 May 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 9 | 2 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Haxx technologies

- [Haxx Curl](https://junglewise.ai/threats/technologies/curl): 43 vulnerabilities
- [Haxx Libcurl](https://junglewise.ai/threats/technologies/libcurl): 21 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Haxx vulnerabilities", https://junglewise.ai/threats/vendors/haxx, 9 November 2026.