CVE-2026-2739: nextcloud-server-33 Infinite Loop
CVSS: 6.9v4.0MediumDeferred
AliasesUBUNTU-CVE-2026-2739DEBIAN-CVE-2026-2739CGA-6q4j-x2jp-7w5hCGA-8f9r-4xr3-538cCGA-8mf9-fj26-mq9wCGA-f5g8-5wqc-fg9pCGA-jhqm-vqxf-6p89CGA-m4rc-365h-hmr7CGA-pv54-w5xm-9r76CGA-px2v-rw39-4rpgGHSA-378v-28hj-76wfCGA-23m6-q98c-vcrxCGA-2ghw-3r9h-v7x7CGA-2mm5-v46h-89hvCGA-2qhr-v7vr-pf65CGA-2vpf-3xjj-4rhfCGA-2w7q-w28g-pw84CGA-337g-cfgj-fjhcCGA-34p2-444j-mpv4CGA-35m2-3qx6-7vpmCGA-3f27-fcvc-j4x7CGA-3g44-m658-6gq5CGA-3pfc-mxfx-2pc8CGA-46h6-qgpr-7p2jCGA-46q4-xrvh-2xc3CGA-4948-3m3f-fj4mCGA-4f44-wqph-g4g5CGA-4j3g-hmqv-5qp9CGA-528h-22fw-xvm6CGA-56q2-xv2c-cgv3CGA-5cjv-vhqg-xr58CGA-5g3g-jghj-xpfjCGA-5mxj-5x2f-xhfrCGA-5xh2-2g56-r72pCGA-64jw-rgjr-hg9cCGA-6759-jqg7-w5jxCGA-698g-3c79-v936CGA-69fv-q2h3-x553CGA-6g44-3c53-5gwjCGA-6g8c-2ph8-hgmvCGA-6ppf-8qqx-rv88CGA-6vrw-256f-vwg5CGA-6vvc-w2vf-46qhCGA-762q-qp3p-pmwcCGA-7gfj-93pw-58gwCGA-7gmv-4phv-g3jcCGA-7hpf-57fj-q44gCGA-7qc3-r844-wpwvCGA-7vrh-63p5-rw8mCGA-852w-c65m-7cv5CGA-8f52-p6r7-578fCGA-8fgm-5gqc-62f7CGA-8j34-3wc6-p2xqCGA-8mcg-6w6r-7c46CGA-8p2m-qx89-8gj8CGA-8pwr-chjj-4qhmCGA-8r94-9945-gqm3CGA-947g-mc6f-v9p7CGA-94wc-w63h-xqqwCGA-9cx3-82v9-55f5CGA-9v7r-5rhg-6cqvCGA-c6r4-cwqq-g2vcCGA-c76w-jcmf-p23hCGA-ccjh-fhr2-xjj8CGA-cfmq-v7vc-mmrcCGA-ch4h-hrj9-jj2qCGA-cqx2-c94g-prhgCGA-crmr-2hqp-xjr8CGA-cwm8-whcp-3j8hCGA-cxxh-fvwf-q5qpCGA-f6rf-prwg-5xj9CGA-fchw-mq7q-x42xCGA-fh54-cpxg-98hxCGA-fr8m-cfc5-8247CGA-g4g2-c235-c6rpCGA-gcp7-8xh7-fwh6CGA-gh7v-r6cf-846qCGA-gp48-f98x-j7wfCGA-gwp6-38xg-9wcqCGA-h2cv-62hw-72vmCGA-hfxg-99w7-33f8CGA-hggx-7h38-4rpjCGA-hrm6-7w9f-gh82CGA-hx95-f2mx-59jfCGA-j4rc-43r5-wf63CGA-j672-c6rg-w36vCGA-j6fr-pfgj-767pCGA-j9gm-j6m5-pr6wCGA-jc7x-p3r3-wpj2CGA-jrgg-rv7j-8x93CGA-jw74-jhhm-36vvCGA-jwgx-73wf-283jCGA-m3wp-9v39-59x4CGA-m5wx-fwcv-g5q2CGA-m7hw-g7j9-mvw9CGA-mhpg-866r-226pCGA-p32f-hm4h-j522CGA-p3c4-mf25-7hh2CGA-p5pw-598p-wrrrCGA-ppqw-m973-mv57CGA-prv6-4r3r-p547CGA-pw3p-cf5v-35vhCGA-pwrf-2qmg-gjf5CGA-q2hv-2fr9-xgwfCGA-q83v-gm24-686xCGA-qjhw-q8wr-h74rCGA-qqhw-hcw7-v385CGA-r6m5-8hfg-m6x4CGA-r9f3-fc54-cvcfCGA-rp7x-w48r-j37mCGA-rvcf-7mh5-6hhpCGA-v33c-pmfv-x2hvCGA-v367-mgjv-rm4rCGA-vc4j-cmq7-92cvCGA-vp8p-xw3p-f25xCGA-vqrh-mpgp-2rjxCGA-vvvr-w397-7x93CGA-w7f4-xhfc-7rcpCGA-w7m9-725f-mpgfCGA-whxj-5q6m-5jmqCGA-wmfw-r6cc-h8xwCGA-wpgh-xg8r-63q9CGA-wq56-9672-87pmCGA-wqcg-gcmx-c9x3CGA-wqh7-6qpv-jwvxCGA-wr6j-848c-rgccCGA-wvgc-47h2-vjc2CGA-wxpp-xx6w-mjgpCGA-x3cv-36ch-5xjjCGA-x3f3-rc3w-w4ffCGA-x74w-wq29-75qjCGA-xf2m-cp54-r54qCGA-xj47-xrf9-pv9hCGA-xq6c-6q8g-c657CGA-xqx5-j66x-hf36CGA-xrjg-4g8x-fhmrCGA-xx8q-735j-mwmq
Published 20-02-2026Last modified 20-02-2026
Vulnerability summary
CVE-2026-2739 is a medium (CVSS 6.9) Infinite Loop vulnerability in nextcloud-server-33. EPSS estimates a 0.67% chance of exploitation in the next 30 days, higher than 51.1% of scored vulnerabilities.
CVSS score
6.9/10
010
Medium · v4.0 (CVE.org)EPSS score
0.67%
0%100%
Low · +0.18 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 1 · Related 2Timeline
- 20-02-2026PublishedVulnerability first disclosed.
- 20-02-2026Last modifiedVulnerability information updated.
Description
This affects versions of the package bn.js before 5.2.3. Calling maskn(0) on any BN instance corrupts the internal state, causing toString(), divmod(), and other methods to enter an infinite loop, hanging the process indefinitely.
CVSS metrics
10 scores · 7 sources · 2 versionsMedium 6.9Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:PSources7 sources · 5.5–6.9
- OSV · UbuntuEcosystem advisory · calculated6.9MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- OSV · DebianEcosystem advisory · calculated6.9MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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 · calculated6.9MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- OSV · NpmEcosystem advisory · calculated6.9MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- OSV · ChainguardEcosystem advisory · calculated6.9MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- NVDNIST5.5MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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:XDiffers
Medium 5.3Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LSourcesAll 3 agree
- OSV · NpmEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- NVDNIST5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS trend
Probability
0.67%
Chance of exploitation in the next 30 days
Percentile
51%
Versus all other CVEs
30-day change
+0.18 pp
From 0.49% on 20-09-2026
20-09-202620-10-2026
EPSS score0.67%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Chainguard57 products
- gitlab-rails-ce-18.1All versions (No fix recorded)
- gitlab-rails-ce-18.10All versions (No fix recorded)
- gitlab-rails-ce-18.11All versions (No fix recorded)
- gitlab-rails-ce-18.5All versions (No fix recorded)
- gitlab-rails-ce-18.6All versions (No fix recorded)
Wolfi3 products
- nextcloud-server-33< 33.0.6-r9
- opensearch-dashboards-3< 3.5.0-r5
- sqlpad< 7.5.7-r10
Debian1 product
- node-bn.jsAll versions (No fix recorded) | < 5.2.3+~5.2.0-1
Npm1 product
- bn.js< 4.12.3 | ≥ 5.0.0, < 5.2.3
Ubuntu1 product
- node-bn.jsAll versions (No fix recorded)
5 vendors · 63 products
References
14 links
Show all 14 references
- github.com/indutny/bn.jsPACKAGE