CVE-2025-14819: OpenSSL partial chain store policy bypass

Published Dec 31, 2025
·
Updated

Accelerate. An out-of-bounds read was addressed with improved bounds checking.

Other sources

Accounts. A parsing issue in the handling of directory paths was addressed with improved path validation.

— Apple

Accounts. A permissions issue was addressed with additional restrictions.

— Apple

Accounts. An authorization issue was addressed with improved state management.

— Apple

afpfs. A buffer overflow was addressed with improved bounds checking.

— Apple

AirDrop. A reachable assertion was addressed with improved input validation.

— Apple

Credit

Seiji Sakurai@@HeapSmasher, Asaf Cohen, Arash Ale Ebrahim(SCy), Dave G., Vamshi Paili, Tony Gorez for Reverse Society@@tonygo_, CVE-2026-1837, impost0r (ret2plt), Nicholas Soh, David Ige(Beryllium Security), Andreas Jaegersberger & Ro Achterberg(Nosebeard Labs), Arni Hardarson, Niels Hofmans(TrendAI Zero Day Initiative), Anonymous(TrendAI Zero Day Initiative), CVE-2025-14017, CVE-2025-14819, Alex Radocea, Kun Peeks@@SwayZGl1tZyyy, Aswin Kumar Gokula Kannan, Gandalf4a(PKU), Anton Pakhunov, an anonymous researcher, Suresh Sundaram, Jiri Ha, wdszzml, Atuin Automated Vulnerability Discovery Engine, Johnny Franks@@0xjohnny, Google Threat Analysis Group, Mihalis Haatainen, Ari Hawking, Ashish Kunwar, Richard Zana, Dhiyanesh Selvaraj@@redroot97, Somair Ansar, Vaagn Vardanian, Nathaniel Oh@@calysteon, beist, Yiğit Can YILMAZ@@yilmazcanyigit, popku1337(STAR Labs SG Pte), Billy Jheng Bing Jhong(STAR Labs SG Pte), Pan Zhenpeng@@Peterpan0927(STAR Labs SG Pte), Robert Tran, Aswin kumar Gokulakannan, Calif.io in collaboration with Claude, Anthropic Research, Csaba Fitzl@@theevilbit(Iru), Ryan Hileman via Xint Code (xint.io), Chris Betz(Talence Security), Tristan Madani@@TristanInSec(Talence Security), Ruslan Dautov, Prathamesh Walunj@@attahasa, Atul R V, Omar Cerrito, Ricardo Prado, Ian van der Wurff (ian.nl), Michael DePlante@@izobashi(TrendAI Zero Day Initiative), Dan Raviv, Ilya Sc. Jowell A., Peter Malone, Doron Assness, Surya Kushwaha(Supernetworks), Robert Tran(Supernetworks), Peter Malone(Supernetworks), Dave G.(Supernetworks), Alex Radocea(Supernetworks), Pan ZhenPeng@@Peterpan0927(STAR Labs SG Pte), Andy Koo@@andykoo(Hexens), Amy (amys.website), YingQi Shi@@Mas0nShi(DBAppSecurity's WeBin lab), David Ige - Beryllium Security, Cantina, Luke Francis, kwak kiyong / kakaogames, Vitaly Simonovich, Adel Bouachraoui, greenbynox, Do Young Park, Artem Dinaburg(Trail of Bits via Anthropic CVD), Yuhao Hu, Yuanming Lai, Chenggang Wu, Zhe Wang, Idan Masas(TrendAI Zero Day Initiative), DARKNAVY@@DarkNavyOrg(TrendAI Zero Day Initiative), Daniel Rhea, Luka Rački, wac(TrendAI Zero Day Initiative), Kookhwan Lee(TrendAI Zero Day Initiative), Mateusz Krzywicki (iVerify.io), Maher Azzouzi, Aisle offensive security research team (Joshua Rogers(Calif), Luigino Camastra(Calif), Igor Morgenstern(Calif), (Calif), Guido Vranken)(Calif), Maher Azzouzi(Calif), Ngan Nguyen(Calif), dr3dd, Gia Bui@@yabeow(Calif), w0wbox, Milad Nasr, Nicholas Carlini with Claude, Anthropic, Khiem Tran, lebr0nli(National Yang Ming Chiao Tung University), Security, Systems Lab, Kenneth Hsu(Palo Alto Networks), Jérôme DJOUDER, Wang Yu, Brendon Tiszka(Google Project Zero), Adam Franke(CyStack), Trung Nguyen@@everping(CyStack), 이재영(Appknox), Vinay Kumar Rasala (Xplo8E)(Appknox), Stuart Wallace, Arni Hardarson (Neonix Security), Bartlomiej Dmitruk(striga), Stanislaw Strzalkowski(isec), Narendra Singh@@_3P1C, Rahul Raj, Pinak Oza, Robert Mindo, Vladislav Shevchenko (Positive Technologies), tamdao, Franco Belman at Blackwing Intelligence, Peter Malone(cyberplanet), Nicolas Rabrenovic(cyberplanet), Irvin Wang(cyberplanet), Rishabh Jain (rjcyber)(cyberplanet), lokerxx(Economics), Narendra Singh@@_3P1C(Economics), Lyutoon(Economics), Jordy Zomer@@pwningsystems(Economics), Richard Zana(Economics), George Stergiopoulos(Economics), InfoSec lab(Economics), Athens University(Economics), Business, Greece, Aswin Kumar Gokulakannan, 이재영, Pavan Nallamothu, Jared Reyes, John Lussier, Seonung Park, ALTV!ST (altvi.st/), Dun, Daniel Williams, Gergely Kalman@@gergely_kalman, ret2happy, Mathis Mansière, James Duffy@@0x4A616D657344, stratan@@5tratan, Matthew Schneider, Dallas Dubs(Nosebeard Labs), Aaron Grattafiori - NVIDIA AI Red Team(Nosebeard Labs), XBreach.ai(Nosebeard Labs), Yongyue WANG AKA Brian.W(OKX security), Roman Zabicki(Nosebeard Labs), Katika Mohaseen(Nosebeard Labs), an anonymous researcher(Nosebeard Labs), CVE-2026-3784, CVE-2026-3783, HvxyZLF, Lance Cain - Offensive Security Engineer, SpecterOps Inc., Jonathan Bar Or@@yo_yo_yo_jbo, Anthony Laou Hine Tsuei@@anarcheuz, Gil Portnoy & Henry, Ayaan Ahmad, Hyunwoo Kim@@v4bel, erdene-och Byambabayar, Niels Hofmans, Manuel Fernandez (Stackhopper Security), Stanislav Jelezoglo(Positive Technologies), Ilya Andr (andrd3v)(Positive Technologies), Redon Gashi, Nicolas Rabrenovic, Atul R V & Ashmit Sharma, Hcamael, 章鱼哥 （aipyaipy.com）@@aipy, Surya Narayan Kushwaha, Cem Onat Karagun, Alfredo Pesoli@@__rev(Bynar), Jonathan Alush-Aben, PETOWORKS의 Bugeun Choi@@Bugeun, Geonha Lee@@leegn4a, hxr1(STAR Labs SG Pte), Hiroki Imai (LAC Co.(STAR Labs SG Pte), Ltd.)(STAR Labs SG Pte), Igor Ushakov, Adam Doupé(ASU SEFCOM), Ashish Kunwar(MurphySec), f0r(MurphySec), Mahmoud Abdelmoniem(ThreatBook), Feng Xue(ThreatBook), XGPT(ThreatBook), Lyutoon, Hiroki Imai (LAC Co., Ltd.), Fábio Luís@@scanpt, DARKNAVY@@DarkNavyOrg, Gor Aleksanyan, Michal Kosiorek, Eddy Tsalolikhin, Asjid Kalam@@odinshell, Hyunwoo Kim@@v4bel(ThreatBook), Wang Yu(STAR Labs SG Pte), Ernesto Martínez García, Calif Research, Ji'an Zhou, Mingxuan Yang, Ye Zhang, Ye Zhang@@VAR10CK(Baidu Security), Vladislav Shevchenko (Positive Technologies)(STAR Labs SG Pte), Pasquale Scola(STAR Labs SG Pte), Lukas Gerlach, Kirin@@Pwnrin(Fudan University), LFY@@secsys(Fudan University), CVE-2026-4424, Daisuke Hatakeyama Research)@@SYZD, Richard Zana(Nosebeard Labs), wh0am1i, Mickey Jin@@patch1t, Koh M. Nakagawa@@tsunek0h(FFRI Security Inc), Matej Moravec@@MacejkoMoravec, 九宫格(Chongqing Telecom), Chanwit Muenprakoddee (ChemIndy), Aethel-Systems, Narcis Oliveras Fontàs, Sindre Sorhus, Francisco Knabe, Zachary Neal(Stripe), Hcamael(Stripe), 章鱼哥 (aipyaipy.com)@@aipy(Stripe), JC Alvarado(Stripe), Jacob Hazak, @@pixiepointsec, Nik Tsytsarkin, Junming C.(Chapoly1305), Vivek Dhar, ASI (RM) in Border Security Force, FTR HQ BSF Kashmir, He Wei (ギカク)(Cisco Talos), Claudio Bozzato(Cisco Talos), Francesco Benvenuto(Cisco Talos), Kitten Food, Tien-Chih Lin(CyCraft Technology), Bruce Dang(Calif), Aaron Grattafiori - NVIDIA AI Red Team, Pyrophoria, Estifanos Megersa, Ahmed Uddin, yk lin@@pixiepointsec, silo, wdszzml(Bynar), Atuin Automated Vulnerability Discovery Engine(Bynar)

Affected Software

6 affected componentsFixes available
redhat/libcurl
IBM API Connect<=V10.0.8.0 - V10.0.8.9
Apple macOS Tahoe<26.5
26.5
haxx curl>=7.87.0<8.18.0
Apple macOS Sequoia<15.7.8
15.7.8
Apple macOS Sonoma<14.8.8
14.8.8

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 26.5
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 15.7.8
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 14.8.8
  4. Configuration

    For TLS-related transfers using reused easy or multi handles, avoid changing (or reversing) the CURLSSLOPT_NO_PARTIALCHAIN option. Keep the option value consistent so libcurl does not accept an OpenSSL trust chain it otherwise would not when a CA store cached in memory is reused.

    curl (libcurl) CURLSSLOPT_NO_PARTIALCHAIN = Do not alter/flip this option during TLS transfers; ensure the option is kept consistent so partial chain stopolicy bypass cannot occur with reused easy or multi handles

Event History

Dec 31, 2025
Data Sourced
via Red Hat·04:09 AM
DescriptionSeverityAffected Software
Jan 8, 2026
CVE Published
via MITRE·10:07 AM
Data Sourced
via MITRE·10:07 AM
DescriptionWeakness
Data Sourced
via NVD·10:15 AM
RemedyDescriptionSeverityWeaknessAffected Software
May 11, 2026
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
DescriptionWeakness
Jul 7, 2026
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software
Jul 27, 2026
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2025-14819?

CVE-2025-14819 has been classified with a severity that may impact the security of TLS transfers due to improper handling of CA store caches.

2

How do I fix CVE-2025-14819?

To fix CVE-2025-14819, update to the latest version of libcurl that addresses this vulnerability.

3

What is the impact of CVE-2025-14819 on TLS transfers?

CVE-2025-14819 can lead to the unintended reuse of CA store caches, potentially violating the user's security expectations.

4

Which versions of libcurl are affected by CVE-2025-14819?

CVE-2025-14819 affects all versions of libcurl that allow for TLS transfers while reusing handles with the altered CURLSSLOPT_NO_PARTIALCHAIN option.

5

Who should be concerned about CVE-2025-14819?

Developers and system administrators using affected versions of libcurl for TLS communications should be concerned about CVE-2025-14819.

Company

Resources

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