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Fencer Vulns
high 7.5

CVE-2017-11692 json

The function "Token& Scanner::peek" in scanner.cpp in yaml-cpp 0.5.3 and earlier allows remote attackers to cause a denial of service (asse…

published 2017-07-30 9 y ago modified 2026-07-18 3 mo ago also EUVD-2017-3302 , JLSEC-2026-22

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 83%
public exploits
0
none known

Summary

The function "Token& Scanner::peek" in scanner.cpp in yaml-cpp 0.5.3 and earlier allows remote attackers to cause a denial of service (assertion failure and application exit) via a '!2' string.

Patch / fix

  • julia yaml_cpp_jll 0.6.3+0
  • yaml-cpp Debian 14, Debian 13, Debian 12 0.6.3-1

debian advisories DEBIAN-CVE-2017-11692

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-11692 updated cvss 5.9

yaml-cpp: assertion failure in Token& Scanner::peek function

  • Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) yaml-cpp Red Hat OpenStack Platform 8 (Liberty) yaml-cpp Red Hat OpenStack Platform 9 (Mitaka) yaml-cpp Red Hat OpenStack Platform 10 (Newton) yaml-cpp Red Hat OpenStack Platform 11 (Ocata) yaml-cpp Red Hat OpenStack Platform 12 (Pike) yaml-cpp
    +2 more products
    Red Hat Satellite 6 yaml-cpp Red Hat Software Collections rh-mongodb26-yaml-cpp, rh-mongodb32-yaml-cpp, rh-mongodb34-yaml-cpp, rh-mongodb30upg-yaml-cpp
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.25% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/jbeder/yaml-cpp/issues/519 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
OSV 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia yaml_cpp_jll
<0.6.3+0
0.6.3+0

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.