# GnuTLS vulnerabilities Source: https://junglewise.ai/threats/technologies/gnutls Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/gnutls.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 21 vulnerabilities in GnuTLS: 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-88647, was published on 8 October 2026. Nothing in the last four weeks, down from 1 vulnerability in the four before. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 1 - All time: 21 (0 critical, 0 exploited in the wild) ## About GnuTLS Open-source library providing SSL/TLS and DTLS protocol implementations with cryptographic algorithms. ## Latest GnuTLS vulnerabilities - [CVE-2026-88647: GnuTLS hostname verification bypass via Common Name fallback](https://junglewise.ai/threats/cve-2026-88647-a-hostname-verification-bypass-in-gnutls-v3-8-13-allows-attackers) (medium, CVSS 6.5, published 8 Oct 2026) - [CVE-2026-42014: GnuTLS use-after-free in gnutls_pkcs11_token_set_pin](https://junglewise.ai/threats/cve-2026-42014-gnutls-use-after-free-in-gnutls-pkcs11-token-set-pin) (medium, CVSS 6.6, published 16 Jun 2026) - [CVE-2026-5419: GnuTLS non-constant-time PKCS#7 padding check](https://junglewise.ai/threats/cve-2026-5419-gnutls-non-constant-time-pkcs-7-padding-check) (low, CVSS 3.7, published 1 Jun 2026) - [CVE-2026-42015: GnuTLS off-by-one error in PKCS#12 bag element bounds check](https://junglewise.ai/threats/cve-2026-42015-gnutls-off-by-one-error-in-pkcs-12-bag-element-bounds-check) (medium, CVSS 5.3, published 26 May 2026) - [CVE-2026-42013: GnuTLS certificate validation bypass via oversized SAN field](https://junglewise.ai/threats/cve-2026-42013-gnutls-certificate-validation-bypass-via-oversized-san-field) (high, CVSS 8.2, published 26 May 2026) - [CVE-2026-42012: GnuTLS certificate validation bypass in URI and SRV SAN handling](https://junglewise.ai/threats/cve-2026-42012-gnutls-certificate-validation-bypass-in-uri-and-srv-san-handling) (high, CVSS 7.1, published 26 May 2026) - [CVE-2026-42009: GnuTLS denial of service in DTLS packet reordering](https://junglewise.ai/threats/cve-2026-42009-gnutls-denial-of-service-in-dtls-packet-reordering) (high, CVSS 7.5, published 18 May 2026) - [CVE-2026-42011: GnuTLS name constraint bypass in certificate validation](https://junglewise.ai/threats/cve-2026-42011-gnutls-name-constraint-bypass-in-certificate-validation) (high, CVSS 7.4, published 7 May 2026) - [CVE-2026-42010: GnuTLS authentication bypass in RSA-PSK username handling](https://junglewise.ai/threats/cve-2026-42010-gnutls-authentication-bypass-in-rsa-psk-username-handling) (high, CVSS 7.1, published 7 May 2026) - [CVE-2026-33846: GnuTLS heap buffer overflow in DTLS handshake reassembly](https://junglewise.ai/threats/cve-2026-33846-gnutls-heap-buffer-overflow-in-dtls-handshake-reassembly) (high, CVSS 7.5, published 4 May 2026) - [CVE-2026-3833: GnuTLS policy bypass in nameConstraints comparison](https://junglewise.ai/threats/cve-2026-3833-gnutls-policy-bypass-in-nameconstraints-comparison) (medium, CVSS 6.5, published 30 Apr 2026) - [CVE-2026-3832: GnuTLS certificate revocation bypass in OCSP response handling](https://junglewise.ai/threats/cve-2026-3832-gnutls-certificate-revocation-bypass-in-ocsp-response-handling) (low, CVSS 3.7, published 30 Apr 2026) - [CVE-2026-33845: GnuTLS integer underflow in DTLS handshake parsing](https://junglewise.ai/threats/cve-2026-33845-gnutls-integer-underflow-in-dtls-handshake-parsing) (high, CVSS 7.5, published 30 Apr 2026) - [CVE-2026-1584: GnuTLS NULL pointer dereference in PSK binder verification](https://junglewise.ai/threats/cve-2026-1584-gnutls-null-pointer-dereference-in-psk-binder-verification) (high, CVSS 7.5, published 9 Apr 2026) - [CVE-2025-14831: GnuTLS denial of service via excessive resource consumption during certificate verification](https://junglewise.ai/threats/cve-2025-14831-gnutls-denial-of-service-via-excessive-resource-consumption) (medium, CVSS 5.3, published 9 Feb 2026) - [CVE-2025-9820: GnuTLS stack overflow in gnutls_pkcs11_token_init](https://junglewise.ai/threats/cve-2025-9820-gnutls-stack-overflow-in-gnutls-pkcs11-token-init) (medium, CVSS 4, published 26 Jan 2026) - [CVE-2025-6395: GnuTLS NULL pointer dereference in _gnutls_figure_common_ciphersuite](https://junglewise.ai/threats/cve-2025-6395-gnutls-null-pointer-dereference-in-gnutls-figure-common) (medium, CVSS 6.5, published 10 Jul 2025) - [CVE-2025-32990: GnuTLS certtool heap buffer overflow in template parsing](https://junglewise.ai/threats/cve-2025-32990-gnutls-certtool-heap-buffer-overflow-in-template-parsing) (medium, CVSS 6.5, published 10 Jul 2025) - [CVE-2025-32989: GnuTLS heap buffer overread in SCT extension parsing](https://junglewise.ai/threats/cve-2025-32989-gnutls-heap-buffer-overread-in-sct-extension-parsing) (medium, CVSS 5.3, published 10 Jul 2025) - [CVE-2025-32988: GnuTLS double-free in Subject Alternative Name export logic](https://junglewise.ai/threats/cve-2025-32988-gnutls-double-free-in-subject-alternative-name-export-logic) (medium, CVSS 6.5, published 10 Jul 2025) - [CVE-2024-12243: GnuTLS denial of service via inefficient DER decoding in libtasn1](https://junglewise.ai/threats/cve-2024-12243-gnutls-denial-of-service-via-inefficient-der-decoding-in-libtasn1) (medium, CVSS 5.3, published 10 Feb 2025) ## Most severe GnuTLS vulnerabilities - [CVE-2026-42013: GnuTLS certificate validation bypass via oversized SAN field](https://junglewise.ai/threats/cve-2026-42013-gnutls-certificate-validation-bypass-via-oversized-san-field) (high, CVSS 8.2, published 26 May 2026) - [CVE-2026-1584: GnuTLS NULL pointer dereference in PSK binder verification](https://junglewise.ai/threats/cve-2026-1584-gnutls-null-pointer-dereference-in-psk-binder-verification) (high, CVSS 7.5, published 9 Apr 2026) - [CVE-2026-33845: GnuTLS integer underflow in DTLS handshake parsing](https://junglewise.ai/threats/cve-2026-33845-gnutls-integer-underflow-in-dtls-handshake-parsing) (high, CVSS 7.5, published 30 Apr 2026) - [CVE-2026-33846: GnuTLS heap buffer overflow in DTLS handshake reassembly](https://junglewise.ai/threats/cve-2026-33846-gnutls-heap-buffer-overflow-in-dtls-handshake-reassembly) (high, CVSS 7.5, published 4 May 2026) - [CVE-2026-42009: GnuTLS denial of service in DTLS packet reordering](https://junglewise.ai/threats/cve-2026-42009-gnutls-denial-of-service-in-dtls-packet-reordering) (high, CVSS 7.5, published 18 May 2026) - [CVE-2026-42011: GnuTLS name constraint bypass in certificate validation](https://junglewise.ai/threats/cve-2026-42011-gnutls-name-constraint-bypass-in-certificate-validation) (high, CVSS 7.4, published 7 May 2026) - [CVE-2026-42010: GnuTLS authentication bypass in RSA-PSK username handling](https://junglewise.ai/threats/cve-2026-42010-gnutls-authentication-bypass-in-rsa-psk-username-handling) (high, CVSS 7.1, published 7 May 2026) - [CVE-2026-42012: GnuTLS certificate validation bypass in URI and SRV SAN handling](https://junglewise.ai/threats/cve-2026-42012-gnutls-certificate-validation-bypass-in-uri-and-srv-san-handling) (high, CVSS 7.1, published 26 May 2026) - [CVE-2026-42014: GnuTLS use-after-free in gnutls_pkcs11_token_set_pin](https://junglewise.ai/threats/cve-2026-42014-gnutls-use-after-free-in-gnutls-pkcs11-token-set-pin) (medium, CVSS 6.6, published 16 Jun 2026) - [CVE-2025-32988: GnuTLS double-free in Subject Alternative Name export logic](https://junglewise.ai/threats/cve-2025-32988-gnutls-double-free-in-subject-alternative-name-export-logic) (medium, CVSS 6.5, published 10 Jul 2025) ## Vulnerabilities per week Nothing in the last four weeks, down from 1 vulnerability in the four before. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 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 | 1 | 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 | ## Other Gnu technologies - [Gnu Binutils](https://junglewise.ai/threats/technologies/binutils): 42 vulnerabilities - [Gnu Glibc](https://junglewise.ai/threats/technologies/glibc): 20 vulnerabilities - [Gnu LibreDWG](https://junglewise.ai/threats/technologies/libredwg): 14 vulnerabilities - [Gnu Emacs](https://junglewise.ai/threats/technologies/emacs): 10 vulnerabilities - [GNU tar](https://junglewise.ai/threats/technologies/tar): 10 vulnerabilities - [Gnu C Library](https://junglewise.ai/threats/technologies/c-library): 9 vulnerabilities - [Gnu Bash](https://junglewise.ai/threats/technologies/bash): 7 vulnerabilities - [Gnu Wget](https://junglewise.ai/threats/technologies/wget): 7 vulnerabilities - [Gnu Cpio](https://junglewise.ai/threats/technologies/cpio): 5 vulnerabilities - [Gnu Grub2](https://junglewise.ai/threats/technologies/grub2): 5 vulnerabilities - [Gnu Aspell](https://junglewise.ai/threats/technologies/aspell): 4 vulnerabilities - [GNU Coreutils](https://junglewise.ai/threats/technologies/coreutils): 4 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, "GnuTLS vulnerabilities", https://junglewise.ai/threats/technologies/gnutls, 13 November 2026.