[NEW] [medium] Bitwarden: Vulnerability allows file manipulation

mediumCVE-2026-71959

A remote, anonymous attacker can exploit a vulnerability in Bitwarden to manipulate files.

CSIRTS triage

vendor: Bitwarden product: Bitwarden Path traversal

What: A remote anonymous attacker can exploit a vulnerability to manipulate files.
Who is affected: Bitwarden deployments accessible from the internet.
Urgency: Medium severity; file manipulation by unauthenticated remote users is a clear security risk.
Action: Apply the security patch for Bitwarden immediately.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch Bitwarden

Get an email when a new Bitwarden advisory drops — max one per day, one-click unsubscribe.

Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2737

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-719590.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-71959	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

mediumCVE-2026-71959: Bitwarden Server before 2026.7.2 does not verify that the caller is a member of the organizati…nvd

Recent advisories for Bitwarden

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

mediumCVE-2026-71959: Bitwarden Server before 2026.7.2 does not verify that the caller is a member of the organizati…nvd · 2026-08-10
highCVE-2026-47164: Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.36.0, Vaultwarden's S…nvd · 2026-07-15
mediumCVE-2026-47160: Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.36.0, Vaultwarden's /…nvd · 2026-07-15
unknownCVE-2026-47159: Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.36.0, Vaultwarden's S…nvd · 2026-07-15
highCVE-2026-47158: Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.36.0, Vaultwarden's S…nvd · 2026-07-15
unknownBitWarden security advisory (AV26-683)cccs · 2026-07-10