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CVE-2026-33069— PJSIP has an Out-of-bounds Read in SIP multipart parsing

Quick assessment

Affected
pjsip pjproject
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PJSIP是pjsip开源的一个免费和开源的多媒体通信库，用C语言编写，实现基于标准的协议，如SIP, SDP, RTP, STUN, TURN，和ICE。 PJSIP 2.16及之前版本存在缓冲区错误漏洞，该漏洞源于pjsip_multipart_parse函数存在越界读取，可能导致相邻堆内存泄露。

AI Predicted 6.5 Difficulty: Easy EPSS 0.43% · P35

Possible ATT&CK Techniques 1 AI

T1213 · Data from Information Repositories
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I. Basic Information for CVE-2026-33069

Vulnerability Information
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Vulnerability Title
PJSIP has an Out-of-bounds Read in SIP multipart parsing
Source: CVE Program / CVE List V5
Vulnerability Description
PJSIP is a free and open source multimedia communication library written in C. Versions 2.16 and below have a cascading out-of-bounds heap read in pjsip_multipart_parse(). After boundary string matching, curptr is advanced past the delimiter without verifying it has not reached the buffer end. This allows 1-2 bytes of adjacent heap memory to be read. All applications that process incoming SIP messages with multipart bodies or SDP content are potentially affected. This issue is resolved in version 2.17.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
PJSIP 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PJSIP是pjsip开源的一个免费和开源的多媒体通信库，用C语言编写，实现基于标准的协议，如SIP, SDP, RTP, STUN, TURN，和ICE。 PJSIP 2.16及之前版本存在缓冲区错误漏洞，该漏洞源于pjsip_multipart_parse函数存在越界读取，可能导致相邻堆内存泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
pjsip pjproject < 2.17 -

II. Public POCs for CVE-2026-33069

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III. Intelligence Information for CVE-2026-33069

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Patches & Fixes for CVE-2026-33069 (1)

Vendor Advisories for CVE-2026-33069 (1)

Same Patch Batch · pjsip · 2026-03-20 · 3 CVEs total

CVE-2026-32942 PJSIP has ICE session use-after-free race conditions
CVE-2026-32945 PJSIP is vulnerable to Heap-based Buffer Overflow through DNS parser

IV. Related Vulnerabilities

Same product: pjproject
Same vendor: pjsip
Same weakness: CWE-125

V. Comments for CVE-2026-33069

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