CVE-2026-101912: beaugunderson ip-address Incorrect Comparison
CVSS: 6.3v4.0MediumDeferred
AliasesUBUNTU-CVE-2026-101912DEBIAN-CVE-2026-101912CGA-38qm-6cjc-c2r6CGA-3rq9-mg3m-7w6cCGA-5whw-x3jx-cwqjCGA-633f-jgvj-jg6qCGA-6wmv-ggr9-hv2fCGA-7r79-68rh-78q2CGA-8qcr-7cc8-fcg3CGA-c779-f3m3-rgv7CGA-c7hp-wq5v-gvffCGA-g799-8j29-x83pCGA-gwv6-7prj-p3h8CGA-hmfw-45w5-9g77CGA-hvcg-5jxw-q5g6CGA-jcf5-39x3-33mgCGA-mfxg-5fr9-h8x5CGA-p64h-fj49-r6rxCGA-q6g3-q84x-ggm7CGA-x449-mw93-5jg9CGA-x865-qwhh-47xmCGA-xrrc-c4q2-m273GHSA-j6r3-76f7-8jcvCGA-28f9-77c7-gc5wCGA-2g32-3p8w-pv57CGA-2p86-3752-f8jmCGA-2xq6-29hq-2927CGA-383h-5x3c-h7vmCGA-3fcr-3295-46g2CGA-3qjr-9rq4-9wwcCGA-3vq5-4gjj-4p33CGA-43m2-hcg6-3vh5CGA-43v4-7fch-7whvCGA-4crw-6p69-24h8CGA-4p6r-hfj8-42mhCGA-4xgf-v926-f8wxCGA-5gjx-c4gw-57gxCGA-5m2p-2qp3-r735CGA-5wvq-mqpx-xv3qCGA-5xhq-mhcw-gfprCGA-66w7-gv3p-g4vcCGA-6cgc-79vg-f9jxCGA-74q2-4mg7-hq8jCGA-7phj-g6c7-q6wcCGA-7q55-c4gp-xxhxCGA-854c-jj2g-fh62CGA-8p36-33hm-vpgfCGA-982c-cx57-crqvCGA-987r-g3rw-9m4rCGA-c859-pr69-wq7jCGA-c8qp-rmjj-j9qjCGA-crf2-w6v8-pq53CGA-f2r9-rgvw-7cv4CGA-fpgj-q75c-q55xCGA-g6h6-c4v7-79pwCGA-g8gp-6xf8-jfwgCGA-g9gr-42f6-5gq8CGA-gfpq-g7v9-c496CGA-gg7w-c543-4579CGA-ggx3-5p3p-r8jhCGA-gh5w-c543-6phrCGA-gr9j-fr8m-qr3pCGA-gvxp-w6qw-85x8CGA-gw77-77c7-rxp6CGA-h589-x6g6-6qv5CGA-h65c-5g4v-2xggCGA-h6w8-gjjx-6qwjCGA-h8pw-h76x-frfhCGA-hgvw-wwq3-mfp7CGA-hw4v-cj9g-8hj2CGA-j2w3-fhx3-p582CGA-jm7f-qm97-pwvcCGA-mjxh-c46q-mpgmCGA-mmr6-w6xf-44x2CGA-p7jx-r3f4-q5m5CGA-ph4x-9gp8-gh2cCGA-pvjp-w826-qrqxCGA-q498-f6cx-g24hCGA-qrv9-wrch-f5xpCGA-r265-xcjv-rm8jCGA-r327-4rcf-qfprCGA-rmpv-hj62-8fw7CGA-v587-xfw4-9q4rCGA-vx94-mw7r-f4vjCGA-w3h9-jxmj-wpp2CGA-w3rv-vc47-34g2CGA-w4hp-fqcg-6j35CGA-w58q-x7pw-2946CGA-wmqx-344f-ff3fCGA-wwh2-jjv6-7x76CGA-x7pr-x9cv-7pgjCGA-xrxp-4jf3-5h5vCGA-xxxj-qh7q-wprgCGA-624v-8mhc-qwchCGA-rvcp-537m-q3rc
Published 28-09-2026Last modified 28-09-2026
Vulnerability summary
CVE-2026-101912 is a medium (CVSS 6.3) Incorrect Comparison vulnerability in beaugunderson ip-address. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.4% of scored vulnerabilities.
CVSS score
6.3/10
010
Medium · v4.0 (CVE.org)EPSS score
0.37%
0%100%
Low · Change unavailableKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 28-09-2026PublishedVulnerability first disclosed.
- 28-09-2026Last modifiedVulnerability information updated.
Description
ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. Prior to 10.7.1, the isInSubnet and isHostInSubnet methods in src/common.ts compare masked binary strings without validating that both operands use the same IP family. A cross-family containment check whose leading address bits match makes the masked strings compare equal even though IPv4 and IPv6 do not share an address space. An allowlist or denylist decision can therefore classify an address outside the intended range as contained. This issue is fixed in version 10.7.1.
CVSS metrics
7 scores · 7 sources · 1 versionMedium 6.3Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:NSourcesAll 7 agree
- OSV · UbuntuEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- OSV · DebianEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/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
- OSV · WolfiEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- OSV · NpmEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- OSV · ChainguardEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- NVDNIST6.3MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/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
EPSS trend
Probability
0.37%
Chance of exploitation in the next 30 days
Percentile
29%
Versus all other CVEs
30-day change
Change unavailable
Change unavailable
29-09-202619-10-2026
EPSS score0.37%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-697Incorrect ComparisonThe product compares two entities in a security-relevant context, but the comparison is incorrect.
- CWE-843Access of Resource Using Incompatible Type ('Type Confusion')The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
Affected systems
Chainguard36 products
- actions-runner< 2.337.0-r2
- code-server< 4.139.1-r3 | < 4.139.1-r1
- commercial-gitlab-rails-ee-19.1< 19.1.7-r3
- commercial-gitlab-rails-ee-19.2< 19.2.7-r1
- commercial-gitlab-rails-ee-19.3< 19.3.3-r1
Wolfi7 products
- code-server< 4.139.1-r3 | < 4.139.1-r1
- lerna< 10.0.1-r7
- npm-12< 12.2.0-r1
- opensearch-dashboards-3All versions (No fix recorded) | < 3.9.0-r1
- prism< 5.16.0-r14
Beaugunderson1 product
- ip-address< 10.7.1
Debian1 product
- node-ip-addressAll versions (No fix recorded) | < 10.7.2-1
Npm1 product
- ip-address< 10.7.1
Ubuntu1 product
- node-ip-addressAll versions (No fix recorded)
6 vendors · 47 products
References
9 links- github.com/beaugunderson/ip-address/security/advisories/GHSA-j6r3-76f7-8jcvX Refsource CONFIRMREPORTAdvisoryWEB
- github.com/beaugunderson/ip-address/commit/1343629d57fea413644a5c9d41ff1e59619f3f28X Refsource MISCREPORTFIXWEB
