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CVE-2026-29068· NVD / CVE Program· CNA GitHub_M

PJSIP: Stack buffer overflow in Opus codec parser

PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, there is a stack buffer overflow vulnerability when pjmedia-codec parses an RTP payload contain more frames than the caller-provided frames can hold. This issue has been patched in version 2.17.

HighCVSS 8.7 · v4.0—No exploit Fix available
Published
Mar 6, 2026
Updated
Jun 17, 2026
EPSS
0.5% · 42th percentile
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Report tools

JSON

Action score

34

Monitor

Low priority for now.

CVSS
34 / 40 · 8.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
8.7
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
pjsippjsip

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • pjsip pjsipbefore 2.17

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • pjsip pjproject

    • < 2.17affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.24pjprojectbefore 2.17-r02.17-r0
Debian:14asteriskbefore 1:22.10.0+dfsg+~cs6.17.60671434-11:22.10.0+dfsg+~cs6.17.60671434-1

Same product

pjsip: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-24786Potential out-of-bound read/write in PJSIP
    40Plan
  • CVE-2022-23547Heap buffer overflow in pjproject when decoding STUN message
    39Monitor
  • CVE-2022-39244Buffer overflow in pjlib scanner and pjmedia
    39Monitor
  • CVE-2026-40614PJSIP: Heap buffer overflow in Opus codec decoding
    34Monitor
  • CVE-2026-28799PJSIP: Heap use-after-free in PJSIP presence subscription termination handler
    34Monitor
  • CVE-2026-32945PJSIP is vulnerable to Heap-based Buffer Overflow through DNS parser
    33Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
pjsip pjproject2.17 · descriptionVendor (CNA)
alpine:pjproject2.17-r0 · Alpine:v3.24Package registry (OSV)
debian:asterisk1:22.10.0+dfsg+~cs6.17.60671434-1 · Debian:14Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-4089246 days apartPJSIP: Stack buffer overflow in pjsip_auth_create_digest2()
    32Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-121 · Stack-based Buffer Overflow

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

  1. Fix✗ → ✓

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References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records